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