Quote Originally Posted by GoktimusPrime View Post
That reminds me, he also transforms into a DVD case.
Already on there mate:

Quote Originally Posted by Zommael View Post
A short-nosed truck (G1 Optimus Prime)
A different, possibly futuristic short-nosed truck (Powermaster Optimus Prime)
A definitely futuristic short-nosed truck (Star Convoy)
A long-nosed truck (Hero Optimus Prime)
A more differenter long-nosed truck (Laser Optimus Prime)
A gorilla (Beast Wars Optimus Primal and Cybertron Optimus Prime)
A different short-nosed truck (Machine Wars Optimus Prime)
A fire engine (Robots in Disguise Optimus Prime)
A (Cybertronian?) monster truck (Armada Optimus Prime)
A Cybertronian short-nosed truck (Energon Optimus Prime)
A Cybertronian/futuristic fire engine (Cybertron Optimus Prime)
Yet another short-nosed truck (Classics Optimus Prime)
A Peterbilt long-nosed truck (Movie Optimus Prime)
Another random fire engine-based thing (Animated Optimus Prime)
Mickey Mouse (Optimouse Prime)
A shoe (Sports Label Convoy)
Another long-nosed truck (Prime Optimus Prime)
Some sort of beast truck (Prime Beast Hunters Optimus Prime)
A pen (unreleased)
A bearbrick (unreleased)
Various Cybertronian somethings
A sports car (Alternity Optimus Prime)
ETA: A baseball cap (thanks liegeprime)
ETA: A DVD case (thanks BigTransformerTrev)
Absolutely nothing at all (various PVC and static action figures, Action Master Optimus Prime)

I'd like to see this list updated with all the latest stuff people have put up - would be interesting to see how many we are up to