[nanolith_]

Lovers In a Dangerous Spacetime was frantic and fun. Managing a ship with someone can lead to fun moments.

[letsgodude567]

I fully support overcooked like others recommended

[Saiyan-Dude]

Human fall flat can be fun coop game and a good laugh

[Foodji]

Castle Crasher or Battle Block is fun

[LaSxrenity]

Not necessarily a completely co-op game, (but I'm pretty sure there are team modes) but definitely give Brawlhala a try. It's a super fun game because of how weird the mechanics are.

[genlock12345]

castle crashers or borderlands

[Serenity19]

I had a blast playing overcooked with my friends

[boynr12]

Gotta say I loved playing Beyond Two Souls and laughing at our bad decisions