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