From the Designer:
A Sci-Fi edition of Basic Action Super Heroes. It uses the same game mechanics, at "Heroic" scale (as opposed to the Super-Heroic scale of the original BASH!). For this reason, the Acronym BASH! says "Basic Action System Heroes" instead on this book, as the "Basic Action System" is the core mechanic.
There are 3 stats rated 1-5 and a list of powers Heroes can buy rated 1-5 as well. Game mechanic is roll 2d6 times stat/skill/power. Rolling doubles on the dice "explode" letting you roll another d6. Ties always go to the Hero.
There are 100 powers to choose from to make characters ranging from space pirates, bounty hunters, starship captains, psionics, aliens, robots, or even holograms.
The book includes equipment, gadgets, alien monsters, space combat rules, special rules for making your own planets or alien races, and writeups for dozens of ships and vehicles. Also included is an Appendix featuring many sub genres of Sci-Fi such as:
Victorian Sci-Fi (ala Verne or Conan Doyle)