[PC] Space Pirates and Zombies Steam $1, DRM Free $0.25 Minimum

IndieGameStand has SPAZ (Space Pirates and Zombies) on a pay what you want deal. Minimum price is $0.25 for DRM free or $1 for a steam key. Pretty fun game which I've played through to completion.

IndieGameStand supports Child's Play Charity, one of the groups the Humble Bundle supports.

From the site:

At its core, Space Pirates and Zombies is an action based, skill oriented, top down space combat game. It’s similar to the ones we knew and loved in years past, but now using full physics simulation and modern graphics for those oh so pretty explosions. But as you dig deeper, SPAZ becomes much more.