Well since no one guessed it I'll spill the beans. It's
Power Lords! for the O2. The only reason I know that is because I filled out screens for the O2 section here at RFGen.
A high profile game like that among collectors I figured would've been an easy one.
Next person who sees this can post the next one.
I shall forever hang my head in shame.
I guess I need to fire up the ol' multicart and refresh my memory on all of the rarities on there.