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