Here is the full list of all 37 Ori and the Will of the Wisps achievements worth 1,000 gamerscore.
Unlocked all Shards
Upgraded all Shards
Defeated Mora Without Taking any Damage
Defeated 3 Enemies with a Single Spike
Completed the Game in Under 4 Hours
Completed the Game without Dying
Beat the Game Without Spending any Spirit Light
Beat the Game Without Equipping a Shard
Completed Hard Mode
Avoided Touching any Corrupted Water
Found all Collectibles
Completed all Wellspring Glades Projects
Completed every Side Quest
Completed the Trade Sequence Quest
Maxed out Life
Maxed out Energy
Completed all Spirit Trials
Upgraded all Abilities
Completed the Game
Defeated Shriek
Defeated the Willow Stone
Bought all Maps from Lupo
Unlocked all Abilities
Escaped from the Ruins
Fended off Kwolok
Defeated Kwolok in Under 2 Minutes
Cleared the Watermill
Escaped the Avalanche
Defeated 5 Enemies Without Touching the Ground
Fended off Mora
Juggled 3 or More Projectiles in the Air for Over 5 Seconds
Completed all Spirit Shrines
Defeated the Horn Beetle
Fended off Howl
Reached the Wellspring Glades
Upgraded all Shard Slots
Defeated 10 Enemies using Environmental Hazards