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