They are moves that cause a large amount of damage, comparable to "Super Moves" found in various other fighting games. True to their name, these moves consist of a short sequence of attacks that zoom in on the target with an X-Ray and displays bones and organs being crushed, smashed and snapped, dealing massive damage. The player must completely charge up the Super Meter in order to perform an X-Ray Move. The X-Ray Move makes a return in Mortal Kombat X.
While incredibly powerful, X-Ray Moves often require special conditions to be met. For example, Johnny Cage's X-Ray Move is classified as a counter-attack, meaning that it is only performed if he is attacked within a few seconds of the player activating it. Other limitations include X-Ray Moves having to be activated from an aerial position (Cyber Sub-Zero's is the only example from the 2011 game with such a requirement), and the fact that the damage inflicted by an X-Ray is altered based on the damage scaling.