The game, partially funded by the Danish Film Institute, has the working title of Project 2.Project 2 is described by the Danish newspaper Politiken as a spiritual sequel to Limbo. It is a 2.5D platform game, using three dimensional graphics while the playfield remains in two dimensionsm, and utilizes the Unity engine; Playdead opted for the existing solution instead of their custom-built engine they had created for Limbo, to reduce their efforts. While the game is in color, the title remains dark and nearly monotone in color. It is planned for release on Microsoft Windows, Mac OS X, PlayStation 3, and Xbox 360 systems. According to an August 2011 interview with Patti, the title's development cycle will take about three and a half years.
PlayDead Reveals Project 2, Looks Like LIMBO Sequel - GamerFront | GamerFront