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