Want to keep FIREFIGHT RELOADED in your Steam library? Well, here's 4 unused keys when I was giving it out as a beta back in September 2015! I was going through my PC and I didn't want to delete these, so here you go:
G9C9L-WIT92-57GL7
8YVE2-QERA4-TQL0E
RATQV-52Z9Z-QXRJH
XCZQ8-6AX75-Q0DI5