To obtain your copy of Robotz DX in a neat CD case complete with GM8 source code and all assets used to make the game, beat all 30 levels in a single sitting and follow the instructions on the end game screen! :)
These are strictly limited in number (50) and will be mailed out on a first come first served basis.
If you can't beat the game but still would like a boxed copy, send me a PM.