Biped is a co-op game that’s really excellent for ruining relationships. You and your partner play as bipedal robots, and the mechanics of moving an individual leg to walk is awkward by design. Moving erratically and accidentally yeeting each other off surfaces is to be expected. I played this with my partner and it was a very fun and chaotic time.

Our characters each hanging off balloons. Our characters sailing two separate rafts.
Our two robot characters standing closely together.
Game stats of our poor teamwork.
We did so poorly we had 6% harmony, died 169 times versus the suggested 3 times, and took 43 minutes instead of 4 minutes to complete the level.