Vlambeer, creators of Super Crate Box on iOS, are celebrating their 3rd "birthday" by giving away some PC downloads here: http://vlambeer.com/3/
Undead, did you get a Luftrauser code to work? I tried about ten and started getting duplicates so I quit. Looks awesome!
I suspect the Luftrauser codes were depleted even before I noticed the deal as limited as they were. Gun Godz looks like an awesome retro first person shooter though.