Project Eden is a 2001 action-adventure video game developed by Core Design and published by Eidos Interactive. It was released for Microsoft Windows and PlayStation 2. The planned Dreamcast version was cancelled. The plot involves a squad of four law enforcement agents investigating the disappearances of people by working their way downwards through layers of a towering mega-city. Project Eden's gameplay emphasises puzzle-solving, requiring the player or players to control each of the four characters and use their individual abilities to make progress. A single player can control any one of the characters, and jump between them at will or up to four players can play simultaneously as different members of the team.