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