Here is the full list of all 10 Papo & Yo achievements. It takes around 6-8 hours to unlock all of the achievements on Windows.
Collect all hats.
Build and cross the houses bridge with only 3 houses.
Splat a frog right on the bullseye.
Run away from Lula for 20 seconds.
Splat 21 frogs at once in the main menu.
Play through the game without reading any hint boxes.
Finish the game.
Revive Lula.
Give Monster a rotten fruit.
Double-jump with Lula to cross the first large gap.