Rocket Jumpers is a game where you use "Rocket Jumps" in order to maneuver around the map. The end product will contain Singleplayer story, a cooperative story (both online and local)and Multiplayer with various game modes(both online and local).
The game (as it's current development state) allows to play Split Screen using the keyboard and an Xbox 360 Controller for PC. You can play up to 4 players, depends on how much controllers you have. Currently the game doesn't have a specific mode, and you'd just battle until someone dies. It is really fun though.