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