By everything I've seen, Extreme Earth does it right. Not only that, but it does it for EIGHT DIFFERENT SYSTEMS. Seriously, if this Kickstarter funds, they're producing conversions for all of the following games:
- Bulletproof Blues
- FATE Accelerated Edition
- Mutants & Masterminds
- Savage Worlds
Not only that, but the setting looks hella compelling and the art is absolutely gorgeous. As I write this, they're $141 from reaching their goal, with five days to go. Help put them over the top!