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