Here is the full list of all 11 Orbo's Odyssey achievements.
Knock over every dog in Shlarp City...
Enjoy Chef Jett's Delicious Special...
Discover the dev room.
Complete every time trial, beating the developer ranks.
Beat the game...?
Defeat S3R.gen...
Finish engineering the prosthetic arm.
Complete every time trial, beating the green ranks.
Return to nothing at the Monolith.
Collect All Obol Fragments