Here is the full list of all 37 Ori and the Will of the Wisps achievements. It takes around 30-35 hours to unlock all of the achievements on Windows.
Complete the Game in Under 4 Hours
Defeat Mora Without Taking any Damage
Beat the Game Without Equipping a Shard
Beat the Game Without Spending any Spirit Light
Complete the Game without Dying
Complete Hard Mode
Avoid Touching any Corrupted Water
Complete the Game
Defeat Shriek
Unlock all Abilities
Upgrade all Shards
Upgrade all Abilities
Complete all Spirit Trials
Defeat 3 Enemies with a Single Spike
Buy all Maps from Lupo
Find all Collectibles
Complete every Side Quest
Complete all Wellspring Glades Projects
Defeat the Willow Stone
Max out Life
Unlock all Shards
Max out Energy
Complete the Trade Sequence Quest
Escape the Ruins
Escape the Avalanche
Complete all Spirit Shrines
Upgrade all Shard Slots
Fend off Kwolok
Defeat Kwolok in Under 2 Minutes
Defeat 5 Enemies Without Touching the Ground
Juggle 3 or More Projectiles in the Air for Over 5 Seconds
Fend off Mora
Clear the Watermill
Reach the Wellspring Glades
Defeat the Horn Beetle
Defeat 10 Enemies using Environmental Hazards
Fend off Howl