Stickfight the game (two stickmen battle with weapons)

Overcooked 1 & 2 (work together and keep the kitchen moving)

Terraria (2D Minecraft with bosses to defeat)

Vampire survivors (if cod zombies arcade, Bloons tower defence and doom all had a baby)

Rocket league (car football (soccer))

Keep talking and nobody explodes (one of you has the instructions, the other has the bomb. Work together and defuse it)

Tricky towers (fun twist on Tetris. Battle each other in a race to the top)