Code Lyoko: Quest for Infinity is a 3D action platformer based on the popular French animated TV series Code Lyoko . The game follows the story of four high school students who discover a computer in an abandoned factory, which leads to a virtual world plagued by the virus X.A.N.A. The characters' backgrounds are mainly from later seasons in the series.
Players control one of the four heroes - Ulrich, Odd, Yumi or Aelita - as they fight across the virtual environment of Lyoko and the internet against X.A.N.A. and his monsters. Levels are accessed through a main hub, allowing players to switch between characters at any time. However, all characters share health and energy. The heroes' unique abilities can be used to defeat enemies, such as Ulrich's swords or Odd's laser arrows. Yumi's ability to balance on thin ledges is also available. These skills are unlocked throughout the game. X.A.N.A. on the internet can be hunted down using the digital submarine Skidbladnir.