ibb and obb, a cooperative puzzle-platformer, is headed to the PlayStation Network for PlayStation 3 in the future. The game puts two players in a world with two directions of gravity—up and down—and requires that they cooperate to get through the game’s stages. Here’s a trailer to demonstrate:
One example of cooperation that developer, Sparpweed, give is how rewards from enemies are acquired. If one player takes an enemy out, the reward might show up on the other side of the split, requiring the other player to collect it.
ibb and obb doesn’t have a release date yet, but Sparpweed say to expect it sometime in Spring 2013.