It's played Pokemon, Super Mario and Tetris. Now the internet hivemind is trying its hand at Blizzard's card battle Hearthstone.
Hearthmind isn't actually a Twitch Plays venture as it doesn't use the streaming service. But it's very much in the vein of, tasking a group of gamers with collectively playing something together.
The mechanics are different, though. Every five seconds a move is made based on a democratic analysis of viewers' mouse movements.
The scope for tomfoolery and trolling is pretty high but everyone is being on their best behaviour. Honest.