Jason Voorhees, known for his appearances in the cult-classic horror film series Friday the 13th, is a playable guest character in Mortal Kombat X. He was the first character available through DLC as part of the Kombat Pack.

About Jason

Born with a facial disfigurement and presumably mentally handicap, Jason Voorhees was bullied as a young boy with the only person to show him love and affection being his mother Pamela Voorhees. When he was neglected by his camp counselors, who engaged in sexual intercourse and ignored the young boy, resulting him drowning in Camp Crystal Lake. His mother killed all the counselors out of grief and revenge. When she was killed out of retaliation, Jason returned to continue his mother's work, and punish those who hurt him and anyone who dares come to Camp Crystal Lake.

Jason only appears in the ending of the first movie and memories his mother has during the film, though they are brief. His mother is the main antagonist of the first film, a role Jason takes over in every film after. As the series continued onward, Jason was given the traits of being superhuman, most notably his strength and durability, a trait familiar in the slasher genre. It isn't until the 6th movie that these features are expanded upon more and has an undead appearance, a trait he retains for the majority of the franchise, featuring rotting skin, damaged and decomposing clothing, and his bones and organs visible in some appearances, most notably the 7th movie in the series. Jason is known to be unkillable, having been dismembered, set on fire, drowned, stabbed and shot. It isn't until The Final Friday that Jason is seemingly sent to Hell, though this does not entirely mean that Jason is actually dead.

In almost every appearance, Jason wears a Detroit Red Wings goalie hockey mask, starting in the 3rd movie. Since he was entirely absent in the first and fifth movie, he doesn't wear it, but in the second movie and parts of the 3rd, Jason originally wore a white burlap sack over his head before transitioning into his icon hockey mask. In the 2009 remake, which reimagines the first four movies into one, Jason is seen with the burlap sack for the first quarter of the movie then acquires his hockey mask later on. He also retains his non-undead appearance in the remake. A common trait in the movies is the unintentional inconsistency of Jason's mask, which changes design in almost every movie. The only time the mask retains features from a previous movie was from the 3rd to the 4th and the 6th to the 7th, however the designs in the 4th and 6th movies are different. Interestingly, despite this inconsistency, any scarring caused to the mask throughout the series has been retained, with the exception of his mask in Jason Takes Manhattan. The mask used in the 2009 remake was made from a mold of the original but given subtle changes for the film.

Jason uses his machete in almost every appearance, but finds other objects to use to kill his victims. If no item or weapon is available, he bludgeons his victim with his fists. He is known to be a slow, gruesome killer, dispatching victims in violent almost comical ways. In the 2009 remake, this is Jason's first depiction of being a quick, lean killer who uses traps and tunnels around Crystal Lake to kill the characters. The 2009 remake was also the first depiction of Jason running after his victims, a trait absent in the original films.

He has battled fellow horror slasher icon Freddy Krueger in the film Freddy vs Jason, of which ended in a stalemate. He has also battled Freddy in the comics along with Michael Myers from the Halloween franchise, Ash from the Evil Dead franchise, and Leatherface from the Texas Chainsaw Massacre franchise. Of the characters he's fought, Freddy is the only one Jason's had a film crossover with and Leatherface is the only one Jason's been able to fight against in a video game appearance.


Jason sports his usual, rugged attire that is consecutive within the Friday the 13th films. Jason's appearance includes his iconic hockey mask, torn-up jacket and the machete that he wields as a weapon. With the exception of Goro, the Predator, and Tremor, Jason is prominently taller than the other Mortal Kombat X characters.


  • Mortal Kombat X: Death and revenge make up the very core of Jason Voorhees' being. He died as a young boy. His mother killed out of grief and rage. When she was murdered, Jason returned and avenged her. Many times since, the living have tried to send him back to the realm of the dead. He's been stabbed, drowned, electrocuted, hurled into space. But Jason cannot be killed. Cannot be stopped.

Combat characteristics

Powers and abilities

Jason is an undead, ruthless killing machine and possesses immense strength. His undead nature renders him completely implacable and nearly unstoppable, being virtually immortal. Even more so, his brute strength allows him to toss his opponents effortlessly and deliver powerful blows with his fists and machete.

Signature Moves

  • Killing Machine: Jason gains a temporary armor buff at the expense of his ability to jump. While active, Jason is unaffected by any attack and can attack his opponent when they perform a combo or special on him. He will still lose health when an attack hits. When the buff wears off, Jason falls momentarily asleep, rendering him vulnerable. (MKX)
    • If Pursuit is active while in his Relentless variation, it can cause the armor bonus to end prematurely if it if Pursuit ends before the buff does. The opposite can also occur; if the armor buff ends before Pursuit, then it will cause Pursuit to end.
    • The armor buff can only be broken if Jason loses all his current health while it is active, the opponent successfully lands an X-Ray, or in a mirror match against another Jason that has Punishment active. Attacks that parry will also break the armor, not with the buff shattering but rather vanish when the parry is finished.
    • Jason can remove the armor buff himself by successfully connecting his X-Ray attack. If Jason's X-Ray does not connect in time, the buff could wear off thus cancelling Jason's X-Ray startup early, rendering him vulnerable.
      • A glitch can occur if the opponent blocks Jason's X-Ray while the buff is active, removing the buff itself for an unknown reason.
  • Temple Punch: Jason charges towards his opponent with a high fist and punches them to the ground. This attack can hit opponents at full screen distance. (MKX)
    • The enhanced version is called Temple Slam and has armor. Jason lifts the opponent while him/her is still on the ground for a second punch, which knocks them away for increased damage in addition to the starting strike.
  • Choke: Jason reaches and snatches the opponent by the throat and viciously throttles them before flinging them across the arena. (MKX)
    • The enhanced version is called Choke Slam and has Jason snap the opponent's neck during the throttle for more damage, also having armor.
  • Back Breaker: Jason grabs the opponent and breaks their back over his knee before tossing them in the opposite direction. (MKX)
    • The enhanced version is called Spine Shatter and has Jason slam the opponent over his knee a second time before tossing them away for increased damage. It also has armor on startup.
  • Tight Squeeze: Jason reaches forward and pulls his opponent into a crushing bear hug, snapping their back before throwing them in the opposite direction. (MKX)
    • The enhanced version is called Crippler and has Jason snap the opponent's neck for more damage. It also has armor on startup. The enhanced version also gives Jason the option to throw them forwards.
  • Corpse Grab: Jason snatches an airborne opponent and slams them into the floor. The attack is unavoidable once it strikes an airborne opponent. (MKX)
    • The enhanced version, Corpse Slam, does increased damage and Jason slams his opponent on the ground.
  • Bloodshed: Jason lifts the opponent by the neck and impales them with his machete before kicking them to the ground. This replaces Choke for this variation. Unlike Choke, this attack can miss ducking opponents. (MKX - Slasher variation)
    • The enhanced version is called Bloodlust, which has Jason push the machete even deeper into the opponent's abdomen two additional times for more damage before kicking them away. It also has armor.
  • Machete Toss: Jason throws his machete at the opponent. This projectile can hit ducking opponents, unlike most projectiles, but is not an overhead attack. (MKX - Slasher variation)
    • The enhanced version Machete Throw has increased damage and armor.
  • Shoulder Push: Jason shoulder rams his opponent, knocking them to the ground. This replaces Temple Punch for this variation. (MKX - Slasher variation)
    • The enhanced version is called Shoulder Charge, which has armor, increased damage and knocks the enemy away for a farther distance.
  • Psycho Slash: Jason slashes his opponent three times with his machete, knocking them to the ground. (MKX - Slasher variation)
    • The enhanced version Hack 'n' Slash has armor and does double the damage. Jason finishes the combo by stabbing the machete deep into the opponent's shoulder - to the point the weapon gets stuck in it - and then kicking the opponent away to separate them.
  • Lake Mist: Jason disappears in a thick gray mist cloud and reappears behind his opponent. (MKX - Relentless variation)
    • The enhanced version Blood Mist armors Jason while he disappears and has Jason recover from disappearing much quicker.
  • Pursuit: Jason cracks his neck, causing the screen to glow red. During this time, the opponent's run and dash abilities are disabled, and their controls are reversed with the exception of the their Throw and X-Ray and the use of interactables. The effect disappears instantly if Jason is hit. (MKX - Relentless variation)
    • The enhanced version is called Dark Pursuit and has Jason recover from the ability much faster.
  • Damned: Jason's damage output increases based on how close he is to death. (MKX - Relentless variation)
    • This is a passive bonus and does not require activation.
  • Punishment: Jason gains a temporary damage buff, which also causes the chain around his neck to glow green. While active, all of Jason's attacks will break all forms armor, with the exception of Tremor's Krystallization buff. (MKX - Unstoppable variation)
    • The enhanced version is called Rampant, is activated slightly faster, increases the damage even further and retains the same properties.
  • Rise: Jason's hockey mask glows white and he gains a temporary heal over time buff and generates Super Meter. This replaces Killing Machine for this variation. (MKX - Unstoppable variation)
    • The enhanced version, Corpse Walk, activates faster and restores more health over time, but no longer generates Super Meter.
  • Resurrection: When Jason's life bar completely drains, lightning strikes him and he returns from the dead, regaining a portion of health based on how full his Super Meter is. However, Jason can cancel his Resurrection, allowing him to keep his Super Meter, thus, ending the round. If it is what would be the final round of the match, Jason will be forced to resurrect. (MKX - Unstoppable variation)
    • In MKX Mobile, he is allowed one resurrection for his Unstoppable card, and two for his Slasher card, but will not gain health back based on his Super Meter, he will simply resurrect.
      • When he resurrects in MKX Mobile, his overall damage is increased and he gains 1 bar of Super Meter.
  • Heavy Payback: Jason removes the combat knife from his neck and proceeds to stab and slice the opponent once each. He then delivers a knee strike before stabbing them in the stomach, causing a bleed damage-over-time effect. (MKX Mobile - Relentless Card)
    • When the move is performed twice, Jason will throw the combat knife away, and the move will be altered.
      • Jason will now punch his opponent twice followed by an overhead double fist that knocks them to the ground. He will then stomp on their head with his boot to end the combo. When altered, the attack no longer causes bleed.
  • Unyielding Pursuit: Jason's mask begins to glow and he evades any special attack that is used on him by disappearing into a mist cloud after which he retaliates by stabbing his opponent with his machete, stunning them and allowing a free hit. Like Jade, he can not evade X-Ray attacks. (MKX Mobile - Relentless Card)
  • X-Ray Move - The Horror: Jason walks slowly forward with his hand outstretched, seizing the opponent by the neck. He then shoves the blade of his machete up through the opponent's chin and skull, then forces the handle up, snapping their neck backward. He rips the machete out and stabs the opponent in the abdomen, breaking their spine and several ribs. (MKX)

Other Moves

  • Throw: Jason lifts his opponent by the collar, plunges his hand into their stomach and crushes their innards before punching them to the ground. (MKX)
  • Throw: Jason slashes the opponent across the stomach, making them fall to their knees. After a brief pause, he plunges his machete into their head, then kicks them in the face. (MKX - Slasher Variation)
  • Skull Slam: Jason punches his opponent in the head with both fists, which acts as a soft stun. If it connects successfully it will leave the opponent stunned for a brief moment for a free hit. This attack is not available in the Slasher variation. Using this attack twice on a standing opponent will end the current combo unless a special attack is used. Jason can follow-up the attack by pressing the grab button: (MKX)
    • Camp Killer: Jason lifts the opponent up, holds them high in the air and then slams them onto the ground in the opposite direction head first. Like Skull Slam, this follow-up attack is not available in the Slasher variation.
  • Knee Strike: Jason strikes his opponent with a quick knee. Jason can then perform several follow-up attacks afterwards: (MKX)
    • Haunting: Jason delivers a powerful overhead punch that knocks his opponent to the ground.
    • In The Shadows: Jason delivers a powerful uppercut, knocking the opponent in the air effortlessly, allowing for a juggle.
    • Final Friday: Jason grabs his opponent, throttling them violently before throwing them across the stage, full screen, in the opposite direction. This combo acts as a throw and is unblockable. This move is the only follow-up attack from Knee Strike that is not available in the Slasher variation.


  • Kill for Mother: Jason brings out his machete. The opponent looks up, then Jason slashes the opponent to bisect their body diagonally. After three strikes, the upper body is completely severed and falls off as the opponent screams. (MKX)
  • Sleeping Bag Killer: Jason grabs his opponent's leg and smashes his opponent once, causing one arm to come off as the body is dragged back. Then he smashes them down again, causing their other arm to fall off while Jason drags the opponent's body across the floor again. He then smashes them one more time, completely dismembering the opponent, with only one of their legs remaining in his hand. He looks at the leg, then throws it with the rest of the body. (MKX)


  • Brutality #1 - Blunt Trauma: Jason charges at his opponent with either a Temple Slam or a Shoulder Charge, knocking their head off. (MKX)
  • Brutality #2 - Go to Hell: Jason performs his X-Ray Attack, but instead of impaling his opponent in the chest, he slices their head off. (MKX)
    • This brutality will only trigger if Jason walks towards his opponent during the X-Ray itself.
  • Brutality #3 - Blood Bath: Jason performs his Bloodlust grab, stabbing the opponent with his machete before brutally slicing their upper body vertically in half. (MKX - Slasher variation)
  • Brutality #4 - Head Spin: With the Pursuit ability active, Jason performs a Crippler grab, twisting the opponent's head around. (MKX - Relentless variation)
  • Brutality #5 - Spinal Tap: After a Resurrection, Jason performs a Back Breaker with enough force to split his opponent in half. (MKX - Unstoppable variation)
  • Brutality #6: Jason performs his throw, and chops the opponent's head clean in half. (MKXL - Slasher variation - Secret)


  • Mortal Kombat X: "Like Scorpion, Jason Voorhees was a revenant: a vengeful spirit returned to life. Hundreds had fallen victim to his bloodlust. Liu Kang, now ruler of the Netherrealm, took notice. An immortal killer like Jason would be useful in his plan for konquest. He drew Jason into the Netherrealm and offered him an endless bounty of slaughter... in return for his allegiance. Jason's simple reply was to destroy Liu Kang."


  • Jason is the second slasher film villain guest character to appear in the Mortal Kombat series, the first being Freddy Krueger and the third being Leatherface.
    • Overall, he is the second horror movie guest character featured in the series, the first being Freddy Krueger, the third being the Predator, the fourth being Leatherface and the fifth being the Alien.
      • The Predator and Alien are the first and second science-fiction horror movie guest characters, while the latter are from the traditional slasher horror genre.
  • Jason is the only guest character that does not kill Shinnok in his arcade ending.
    • Interestingly, although he and his fellow guest characters are not canon to the series, Jason's ending is surprisingly more canon-like than the other guest characters; it even acknowledges Liu Kang as the new ruler of the Netherrealm, established in the ending of the Story Mode.
  • As with Freddy Krueger before him, when selected, the announcer will say Jason's name in full, saying Jason Voorhees. When Jason wins a match, only his first name will be said.
  • Jason's official announcement teaser trailer was released on a Friday the 13th (March of 2015), matching the title of his origin franchise.
    • Whenever the month happens to fall on Friday the 13th in the mobile version, Jason's challenge will be available for players, in addition to celebrating the day of the franchise's title.
  • Jason's Fatality Sleeping Bag Killer references the movie Friday the 13th Part VII: The New Blood, in which Jason kills Judy by repeatedly smashing her against a tree while she was in a sleeping bag. In MKX, however, he doesn't put his victim in a sleeping bag and slams them against the ground instead.
  • The chain around Jason's neck in his Unstoppable Variation is a reference to Friday the 13th Part VII: The New Blood. The lightning-induced resurrection is a reference to a scene from Friday the 13th Part VI: Jason Lives.
  • Jason is one of the few characters to have a brutality that derives from his X-Ray, and not only from special moves, throws, or combos. The other characters are Sonya, Erron Black, Jacqui Briggs, the Predator, Tremor, Leatherface, and Triborg.
    • He's also one of the few characters who can interrupt his X-Ray to perform a different move, since the characteristic decapitation from his brutality replaces the final hit of his X-Ray. The other characters are Jacqui, Tremor, Triborg, Leatherface, and the Predator.
  • In the Friday the 13th movies, Jason had a misshapen skull, rotting teeth and one of his eyes was lower than the other, but in Mortal Kombat X, every X-Ray shows Jason having a regularly shaped human skull, and a recent hack for the PC version removes Jason's mask and reveals his face, which merely has several scars on an otherwise middle-aged man.
    • While Jason never shows emotion in the movies when he is stabbed, shot, set on fire, etc., removing his mask using this hack and performing a fatality on him will show him in agonizing pain, though this is more than likely just a gameplay mechanic as almost all characters have the same reaction to the same fatalities.
      • Additionally, Jason and Leatherface share the same face when unmasked using this hack, although there are minor differences; the placement of scars, withered skin and Leatherface has a missing nose and rotten teeth.
        • Additionally, Jason never makes any noises when being attacked in the movies. However, during certain fatalities, Jason will let out a moan before falling over dead. This is more easily heard during Goro's Peek-A-Boo fatality, when Goro presses Jason's head into his chest, there is a loud moan from inside. This again is more than likely just a game mechanic as all male characters make the same exact noise.
          • However, he will make no noise when the Kove Stage Fatality is done on him.
  • Jason's default appearance is heavily based off his appearances in Freddy vs. Jason and the 2009 reboot, perfectly replicating his attire from the two films. His Player 2 color is based on Roy Burns' appearance in Friday the 13th: A New Beginning, down to the black clothing and blue hockey mask chevrons.
  • All fights that pit Jason against Reptile, the Predator, Triborg or Alien will activate an odd glitch in which the victim that Jason drags in his intro has the same blood as whoever he's fighting. This is also true for the intro where he removes the combat knife from his neck as the blood around the wound will have the same color blood as his enemy.
  • Jason is one of two characters to receive armor for a teleport ability. The other is Kenshi in his Possessed variation.
    • He also receives the most armor in the game for his teleport, a total of 3 hits, which is the most for any ability.
  • Jason is the second tallest character in MKX to originate from Earthrealm, the tallest being Tremor, and the fifth tallest character in the game next to Goro, the Predator, Torr, and Tremor.
  • Jason is the only character in the game to have specific music play during both of his fatalities.
    • Jason is also the only character in the mobile game to have music play when inspecting his cards, this being the Ki...Ki...Ki...Ma...Ma...Ma... sound.
      • This also plays for all his cards when tagging in, making him the only character that has music play when he tags into a fight.
  • Jason is one of 3 characters in MKX with more than one throw, the others being Johnny Cage and Ferra/Torr.
    • A unique trait with this is that if a certain requirement is met, they produce more than one throw.
    • Jason and Torr are the only two of the three that have more than one throw based on which variation is selected, while Johnny can perform both of his throws in every variation.
  • Jason is one of the few characters to receive an exclusive reskin in the mobile game not featured in the main game.
    • He is also one of three DLC characters to receive an exclusive reskin, the others being Tanya and Goro.
  • While his Unstoppable variation allows him to resurrect in the MKX, in the mobile game, his Slasher variation can do this as well, but twice rather than once.
  • In the mobile game, Jason's Slasher character card is one of four cards that have the grapple bonus on both his first and second special. This means his Slasher card is one of four characters in the mobile game to have three unblockable attacks. The other three are Injustice 2 Raiden, Revenant Jax and Klassic Raiden.
    • Injustice 2 Raiden, however, is the only character who's special moves are completely unblockable where as Jason's attacks can be blocked for a moment before becoming unblockable.
      • With the addition of update 1.18, Klassic Jax is also a character with every attack being a grapple.
  • He was addressed by full name only by Shinnok, but with the release of Mortal Kombat XL, Bo' Rai Cho will also address Jason by his full name.
  • Jason is one of two characters in MKX who has a throw in a combo rather than a special move. The second is Bo' Rai Cho, who has two.
  • Interestingly, when Jason performs his X-Ray Brutality while in his Relentless variation, he will assume the victory pose of his Slasher variation since he uses his machete to kill his opponent.
    • Another interesting thing is with his Slasher variation and his throw brutality; he assumes the victory pose of his other variations instead since the machete is in the opponent's head.
  • When Jason performs his Spinal Tap brutality, he will perform the enhanced version of his Back Breaker on his opponent while not having to actually use the enhanced version to finish the opponent. This makes Jason one of 3 characters to perform an enhanced special during a brutality without actually using said enhanced special. The other two are the Alien and Goro.
    • Ironically, when Jason performs his Blunt Trauma brutality, while not in his Slasher variation, he will perform the regular Temple Punch instead of the enhanced even though the finisher requires him to use the enhanced version.
  • Jason is one of five characters whose voice will not be mimicked by the Predator, instead, the Predator will do its signature laugh. The other four are Alien, Triborg, Leatherface and the Predator in a mirror match.
  • Jason has the most grab attacks out of any character in MKX, with a total of 4.
    • He also has the most tick throws out of any character with a total of 24. Tick throws are grabs that connect on blocking opponents if Jason does certain normal attacks before the grab itself. These grabs are listed below:
      • Tick throws with Tight Squeeze:
        • Back 1, Back 2, Forward 2, Back 3, Down 1, Down 3, Down 4, Jump Attack 1, Jump Attack 2, Jump Attack 3, Jump Attack 4, Standing 1, and the Kombo string 2,4.
      • Tick throws with Back Breaker:
        • Down 1, Down 3, Jump Attack 1, Jump Attack 2, Jump Attack 3, and Jump Attack 4
      • Tick throws with his basic throw:
        • Jump Attack 1, Jump Attack 2, Jump Attack 3, and Jump Attack 4
      • The Final Friday combo is also considered a tick throw.
  • Jason is one of two characters with a soft stun attack rather than an actual stun attack like Scorpion's Spear or Sub-Zero's Ice Ball.
    • Leatherface also has a soft stun attack, though, unlike Jason, he has a regular stun attack as well.
  • Jason and Kotal Kahn are the only characters with anti-air grab abilities.
    • Unlike Kotal Kahn, Jason can not combo off his anti-air.
  • Jason has the second most damage bonuses in MKX, a damage buff and a passive damage buff. The character with the most is Kotal Kahn with 3.
  • Jason is one of two characters that can further increase the damage of a damage increasing ability, this being done by enhancing the special. The first was Ferra/Torr whose damage bonus stacks with each use.
  • Jason and Johnny Cage are the only characters that that gain a damage boost based on a certain level of remaining health.
    • With Johnny, only his specials and some combos are boosted at 5% health, while Jason has his overall damage increased while in his Relentless variation.
      • Unlike Johnny, the damage boost starts at 50% health and increases as he loses more health, maxing out at 5%, granting him a 75% overall damage.
        • Over other updates, originally Jason's damage boost started at 75% health and maxed at 10% and the damage itself was much less.
  • Jason is the only character that can grant armor for a period of time.
    • Unlike other fighters who grant armor for a single hit, Jason's grants armor for multiple hits.
  • Jason is the only character that can reverse the opponent's controls.
  • Jason is the only character without an action after winning a round where he is forced to give his opponent space; he simply turns and walks away immediately upon winning a round.
  • Jason is one of the few characters whose fighting style is altered by the addition or removal of a weapon.
  • The name of Jason's Final Friday attack is a reference to the tagline for Jason Goes to Hell, the ninth film in the Friday the 13th series.
  • He is one of the few characters with every variation available in the mobile game.
    • He is one of two DLC characters with every variation available to play in the mobile game. The other is Triborg.
  • Jason is one of the few characters with a projectile that strikes Mid rather than High, meaning the attack unavoidable when ducking. It can however miss females when they perform a low poke attack.


  • When viewing Jason's bio, the second to last line has an extra space and is missing a period at the end of the sentence.
  • When Jason performs his X-Ray Brutality while in his Unstoppable variation, after he removes the machete to decapitate his enemy, the chain around his neck will disappear. This is likely an error in programming.
    • This is also the case when a Fatality or Faction Kill are used on him while in his Unstoppable variation.
  • During one of Jason's interactions, he removes a combat knife from his neck and throws it to the ground, leaving behind a wound in his neck. While his Unstoppable variation is selected, when he removes the knife, no wound will be visible on his neck but blood will still be visible. It is unknown how or why this happens.
  • If one looks closely during Jason's enhanced Choke Slam, he does not actually close his hand to snap the opponent's neck, giving it the illusion that it snaps on its own.
  • During certain fatalities, Jason will audibly moan before falling dead. This is easily heard during Goro's Peek-A-Boo fatality and Jax's Jax The Ribber fatality. This is likely a gameplay mechanic as all male characters make the same moaning sound, including the Alien and the Predator.
    • However, he will not make any noise when the Kove Stage Fatality is performed on him.
  • When a fatality is used on Jason that creates a hole around his mouth, one can notice that the wound is see-through on the ends. This is more noticeable when his mask is removed using a hack.
    • Additionally, when a large wound is made in Jason's chest, you can visibly see-through his jacket in the side. This is easily seen when his Kill For Mother fatality is performed on himself or during the end of Takeda's Head Cage fatality.
  • Any fatality or brutality performed where a foreign goes through Jason's face which also goes through his mask will not create visible damage to his hockey mask with the exception of black slash marks, though these are present on all characters.
    • However, any fatality or brutality that punctures a larger area of his head will actually damage his mask, like in Jacqui's Fist Bump fatality or the Alien's Little Head brutality.
  • When Jason performs his Kill For Mother fatality on characters that are taller then him, such as Goro or the Predator, he will incorrectly be taller than them when performing the finisher.
  • In the mobile game, the triangles on his mask are absent in his support cards.
  • Jason's X-Ray has a tendency to incorrectly connect due to an odd hitbox;
    • The attack is registered as a Mid attack, but can miss if the opponent ducks in some occasions.
    • Jason sometimes does not have to actually make contact with the opponent for the attack to initiate.
      • This is similar to the hitbox of the Alien's Chop Chop during its Slicer brutality.
    • Sometimes if the opponent successfully jumps over Jason to avoid the attack, even being completely behind him in the process while mid-air, they will teleport into his hand, and the attack will initiate.
    • On some occasions, if the opponent dodges his X-Ray entirely and Jason is still walking, running up to him and making contact from behind will teleport the opponent into his hand, initiating the attack.
  • Jason's X-Ray brutality can trigger despite him not taking the required steps during to actually activate it.
  • When playing his Slasher variation, his machete disappears then reappears in the opposite hand when performing his Kill For Mother fatality.
  • In the mobile game, a glitch can occur when Relentless Jason is against a Dark Emperor Liu Kang;
    • If Jason is not stunned at the start of a match and Liu Kang uses a special attack, Jason will evade and when he returns, he will be unable to attack. Then, Liu Kang will not attack and tagging out will be disabled and attacking the opponent will be disabled as well, resulting in the match being unplayable and needing to be restarted.
  • When Jason performs The Kove Stage Fatality in his Slasher variation, his machete disappears after uppercutting the opponent. This seems to happen with all the Stage Fatalities.
  • As stated above, blocking Jason's X-Ray attack while his armor bonus is active has a chance to remove the buff entirely. This is more than likely a glitch.
  • After Jason decapitates his enemy during his X-Ray brutality, he and his opponent become darker in color saturation for an unknown reason. This also happens with Tremor.
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