Mega Man 2.5D is an unofficial fan-made game created by Peter Sjöstrand and Edgar Cebolledo. The project began in 2009 as an animated mockup. Due to the positive response to it, development began on an actual playable version. The main aspect that sets the game apart from other Mega Man games is the Co-op Mode, which has two players fight side by side in order to get through the game. Another thing that's different in Mega Man 2.5D is the use of changing camera perspectives, which is featured heavily in the single-player mode of the game. Because of these game mechanics, Mega Man 2.5D features separate level designs for its co-op and single-player modes.