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