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