Quick cards i did for con game design. Used for metamorphosis alpha and my gammaworld out of the bunker games. Was possible to end gamma world adventure with space travel.
While playing with cards to allow for mutant,cyborgs, undead, androids, robots, plants etc for games realised the basic use of cards for race/class/occupations for rpg's work really well. Jaded players can pick at random for surprise.
My character sheet in a A6 or A5 zine form idea needs some work too.
The long promised mutation rules project i will try and start.