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