A FANTASTIC underground couch co-op game is “Super Space _____” (read: Super Space Blank).
Imagine Asteroids, but everyone is controlling a cannon on the same ship, and the only means of propelling the ship is Newton’s third law. When your cannon hits an asteroid, it turns your color and when the asteroid leaves the game space the points for that asteroid go to the person whose color the asteroid is. If the ship leaves the game area, the game is over. It’s the best example of co-ompetitive I’ve ever seen.
It’s only available on Digipen’s website since it was a student project but it’s magnificent for up to 4 players