From publisher blurb: Star20 Go is the sci-fi companion to the complete D20 Go roleplaying system, the game system designed for easy access and simplified play-by-post. Star20 Go can be used as a light, standalone system or it can be used as a supplement to the complete D20 Go rules. With Star20 Go, you can easily jump into nearly any sci-fi or space opera setting you can imagine. The rules are inspired by D&D and Lady Blackbird, and give players enormous freedom in creating and customizing characters. Space opera action! Any time. Any where. Features of Star20 Go: Only two types of rolls, all made with a 20-sided die Easy to learn! Fast play - Combat is one round of rolls and resolved narratively to avoid getting bogged down by turn-based combat Six customizable classes: Trooper, Gunslinger, Martial Artist, Scoundrel, Expert, and Mystic Easy ship-building rules Injury conditions instead of hitpoints