Slammer Skirmish is a set of free wargames rules for science fiction skirmishes. The author writes:
Slammer is a set of wargame rules for Science Fiction skirmish games using miniatures. Slammer is not tied to any specific background or company product line, you can use whatever figures or models you have. I intended from the start that Slammer would be flexible and adaptable to different scenarios. I have intentionally kept it fairly ‘loose’, particularly in areas like troop motivation and Hollywood heroics. Slammer is meant to be fun!