d20 Advanced Adventure Roleplaying Game

From the back of the book: In books, movies, television, video games, and just about every form of storytelling today, heroes and villains clash. Some fight with guns, others with martial arts, and still others with swords. They might wield fantastic powers or magic or just good old-fashioned smarts, battling on ships in deep space, or in the dungeons beneath an ancient castle, or even on the mean streets of a gritty urban jungle. Whatever the genre of the adventure you want the d20 ADVANCED ADVENTURE ROLEPLAYING GAME can help you create it.