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