Full list of all 15 Mushroom Quest achievements worth 2,000 gamerscore. It takes around 0.5-1 hour to unlock all of the achievements in the base game.
The base game contains 10 achievements worth 1,000 Gamerscore, and there is 1 DLC pack containing 5 achievements worth 1,000 Gamerscore.
Complete 30 levels
Complete 24 levels
Press the Green Button
Complete 18 levels
Complete 12 levels
Press the Blue Button
Complete 6 levels
Press the Red Button
Fill the pit with a bex
Start the game
Collect 20 crystals
Collect 10 crystals
Collect 5 crystals
Collect 1 crystal
Lose once