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