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