Radioactive waste. Nuclear bomb fallout. Add radiation to something that breeds quick, like rabbits, and you can end up with crazed, Geiger-counter-destroying monstrosities running around trying to collect even more radiation. At least, that's what's going on in Radioactive Bunniez, a new card game up on Kickstarter.
From the campaign:
The campaign's around 5/7 of the way to its goal with 20 days left to go.