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