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
Defeat Mora Without Taking any Damage
Upgrade all Shards
Upgrade all Abilities
Beat the Game Without Spending any Spirit Light
Complete the Game in Under 4 Hours
Beat the Game Without Equipping a Shard
Defeat 3 Enemies with a Single Spike
Defeat 5 Enemies Without Touching the Ground
Complete every Side Quest
Find all Collectibles
Unlock all Shards
Complete all Wellspring Glades Projects
Complete the Trade Sequence Quest
Max out Energy
Max out Life
Complete all Spirit Shrines
Upgrade all Shard Slots
Complete the Game
Complete Hard Mode
Defeat Shriek
Defeat the Willow Stone
Buy all Maps from Lupo
Unlock all Abilities
Escape the Ruins
Escape the Avalanche
Complete all Spirit Trials
Fend off Mora
Fend off Kwolok
Defeat Kwolok in Under 2 Minutes
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