Full list of all 32 Monster Boy and the Cursed Kingdom achievements. It takes around 20-25 hours to unlock all of the achievements on Windows.
Find your first Life Heart.
Sniff 10 secrets in Pig form.
Find your first coin fountain.
Help free the legendary Pepelogoo.
Visit every corner of Monster World Kingdom.
Collect every Life Heart.
Help Ollie find all of his lost music sheets.
Open every chest in Monster World Kingdom.
Collect every Super Fire Truffle.
Collect every Super Thunder Truffle.
Collect every Super Boomerang Truffle.
Collect every Super Tornado Truffle.
Collect every Super Bomb Truffle.
Have Foximus forge every piece of Golden gear.
Find the sacred orb that holds the power of Snake form.
Find the sacred orb that holds the power of Frog form.
Defeat Malino the first time he challenges you to a race.
Find the sacred orb that holds the power of Lion form.
Find the sacred orb that holds the power of Dragon form.
Ring the sanctuary bell.
Bring Nabu back to normal.
Return all three of the old heroes' items to the sanctuary.
Find the sacred orb that restores your original form.
Defeat Xaros and save the kingdom from darkness.
Swallow 10 mosquitos in Frog form.
Kill an enemy with a bomb you swallowed while in Frog form.
Run a long distance without stopping in Lion form.
Make it to the end of the secret Cyber Dungeon.
Buy something from Zeke's shop.
Upgrade your first item at a blacksmith.
Upgrade a full set at a blacksmith.
Restore all your forms after losing them.