Here is the full list of all 20 It Takes Two achievements. It takes around 15-20 hours to unlock all of the achievements on Windows.
All minigames found!
Took things a bit too far, didn't you?
Now look who's extinct!
Breathe some wind into your ocarina, my skyward princess!
Helltower? More like hello-from-up-here-tower!
Shoot for the stars, literally.
They had no way out.
You did it! CO-LLA-BO-RATION!
You reached a higher state of mind. Or at least some peace and quiet.
Release that tension at the root level.
Don't feed the animals! Or do, they're adorable.
Scurvy! Ye look smashing, captain!
Again? Keep track of your kids!
Isn't it pretty? That's going on the fridge.
Choo Choo!
Guess it was time to cash out.
Put on a show and die trying.
The truth was out there all along!
Self-inflicted paparazzi.
It takes two to… torture.