In line with the plot of the same series, William is under XANA's control and being forced to fight against his will. Like its predecessor, the game vaguely follows the plot of Season 4, although it is comparatively shorter. The game starts off with the heroesalreadyknowing what Replikas are, and they start to hunt their supercomputers down. Unlike Code Lyoko: Quest for Infinity, Jeremy mentions that there are hundreds of Replikas. Another differentiation is that the Kolossus appears; its position is the final boss of the game.
Gameplay
Unlike the previous two games, Code Lyoko: Fall of X.A.N.A. uses an RPG-style interface that combines turn-based and real-time combat. The game also has a multiplayer mode, wherein players can face each other in various forms of battle.