Super Slam Dunk Touchdown is an old school inspired, couch-competitive, all-sports mashup that's powered by a 3D physics engine. It looks like a completely mad mix of several different sports with lovely retro aesthetics with an emphasis on local multiplayer.
At the time of posting, there are just over 2 weeks left for the game's Kickstarter Campaign. They're slightly over a fifth of the way to their funding target. The game is being developed for PC, with further ports potentially coming depending on whether stretch goals are met.