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