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