I was thinking of starting a thread like this too probably because I stayed up late and watched Heavy metal 2000 last night. Low and behold I find a thread about the very subject already up on the forums.

I think a good solid freeform game would suffice. You just need to have good players and Gm to not screw it up. However I realize that most people like their systems so I’m going to throw out a mishmash of D20 modern/future with crap ton of FX stuff thrown in there, you know, magic, psionics etc.

Or you could easily convert star wars saga edition over to that. Its got ray guns, magic/psionics (the force) and sword fighting already done for you.