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