Here is the full list of all 33 Snake Pass achievements. It takes around 15-20 hours to unlock all of the achievements on Windows.
Completed Every Level Without Dying
Used Hummingbird Take-Off Points 50 Times
Disturbed A Gatekeeper Idol In Every Level
Collected All Of The Gatekeeper Coins
You Can't Get Better Than 100%
Collected All Of Air's Wisps
Used Snake Vision
Received A Gift From Bloh-Wee, Air Gatekeeper
Completed Lazy Lagoon Without Touching The Water
Used Each Of Noodle's Skills
Received A Gift From Cyn-Derr, Fire Gatekeeper
Collected All Of Fire's Wisps
Used Every Type Of Switch
Death Comes In Many Forms
Collected Two Keystones In Gatekeeper Gardens Without Touching The Floor
Pulled Every Kind Of Face
Used Hummingbird's Tail Lift 100 Times
Used Hummingbird's Tail Lift Continuously In Paradise Path
Got A Hole In One On Crooked Canal
Received A Gift From Sog-Gee, Water Gatekeeper
Collected All Of Water's Wisps
Collected 50% Of The Collectibles
Death Has No Meaning To You
Received A Gift From Bol-Dor, Earth Gatekeeper
Collected All Of Earth's Wisps
Collected 20% Of The Collectibles
Fell To Your Death Near A Danger Sign
Placed Three Keystones Into The Gate
Collected And Placed Keystones On The Gate One At A Time
Fell From A Great Height
Activated A Gate Without Activating Any Checkpoints
Fixed The First Gate
Maintained Top Slither Speed For 10 Seconds