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!
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!
Helltower? More like hello-from-up-here-tower!
Now look who's extinct!
Put on a show and die trying.
You did it! CO-LLA-BO-RATION!
Release that tension at the root level.
Scurvy! Ye look smashing, captain!
Breathe some wind into your ocarina, my skyward princess!
Choo Choo!
Isn't it pretty? That's going on the fridge.
Guess it was time to cash out.
Shoot for the stars, literally.
The truth was out there all along!
They had no way out.
Self-inflicted paparazzi.
It takes two to… torture.