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 Abilities
Complete every Side Quest
Complete all Wellspring Glades Projects
Complete all Spirit Trials
Complete the Trade Sequence Quest
Complete the Game
Defeat Shriek
Defeat the Willow Stone
Buy all Maps from Lupo
Escape the Ruins
Fend off Kwolok
Defeat Kwolok in Under 2 Minutes
Upgrade all Shard Slots
Complete all Spirit Shrines
Fend off Mora
Escape the Avalanche
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
Defeat 5 Enemies Without Touching the Ground
Fend off Howl
Complete Hard Mode
Unlock all Abilities
Unlock all Shards
Upgrade all Shards
Max out Energy
Find all Collectibles
Max out Life
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