The VOIDRUNNER'S CODEX is coming! Explore new worlds, fight oppressive empires, fend off fearsome aliens, and wield deadly psionics with this comprehensive boxed set expansion for 5E and A5E!
d20 Transformers would totally rule.
d20 Battletech would be awesome too.
In fact, d20 <anything with giant robots> would be really cool IMHO.
d20 Alternity
d20 Fallout
d20 Fantasy Sports Leagues!
d20 Street Fighter
d20 Pokemon
d20 Shopping
d20 Quake
d20 Burn a CD and see if you have a coaster
d20 Car buying
d20 Dating
d20 Motocross
d20 Work
d20 Monopoly
d20 MadTV vs Saturday Night Live
d20 X-Com
d20 Black Hawk Down
d20 Fiest
d20 Civilization
d20 Cooking
d20 Las Vegas
d20 Laundry
d20 Pr0n
What about the orignal suggestion? d20 Fill-in-the-Blanks? That would be great you could build your own game with all the 'fluff' text written out for you.
For example in the PHB replace the word 'spell' with 'pants' - makes it a whole new game doesn't it?
Or 'player' with 'contestants' and 'melee' with 'eat' and.....
In another thread someone brought up the idea of a d20 Time Bandits. That would be fun.
In terms of 80's american anime rip offs, Jayce and the Wheeled Warriors had the best vehicles, but I think that Battle of the Planets would make for the best d20 game.
Oh, and as far as Snow Crash goes, I thought that the first 80% of the book was sheer brilliance, but the end was kind of crappy. The amazing occult science-mysticism that made it so good gave way to a Power Rangers episode.