(Disclosure: This site contains product affiliate links. We may receive a commission if you make a purchase after clicking on one of these links. Read our affiliate disclosure for more info.)
Bundle Stars has the Firestorm Bundle on sale for $3.99.
Includes:
Mount & Blade: With Fire And Sword
Project Aftermath
Explodemon
Velocity Ultra
Electronic Super Joy: Groove City
Influx
Imperial Glory
Praetorians
All activate on Steam.