Full list of all 20 Shiro (Windows) achievements worth 3,000 gamerscore. It takes around 1-2 hours to unlock all of the achievements in the base game.
The base game contains 10 achievements worth 1,000 Gamerscore, and there are 2 DLC packs containing 10 achievements worth 2,000 Gamerscore.
Free all birds
Save the sister
Get out of the red mine
Get out of the mushroom forest
Free the Fairy
Leave the temple
Complete the "Forest" location
Die 100 times
Break the bamboo
Don't take damage in the flight section
Defeat 25 enemies
Defeat 20 enemies
Defeat 15 enemies
Defeat 10 enemies
Defeat 5 enemies
Skeleton Squad Destroyer!
Slay one skeleton
Slay the forest warrior
Kill one forest slime
You monster!