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.
Breathe some wind into your ocarina, my skyward princess!
They had no way out.
You reached a higher state of mind. Or at least some peace and quiet.
Scurvy! Ye look smashing, captain!
Isn't it pretty? That's going on the fridge.
Now look who's extinct!
The truth was out there all along!
All minigames found!
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!
Took things a bit too far, didn't you?
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.
Self-inflicted paparazzi.
It takes two to… torture.