Books Useful for this article. SR1 Core - PDF SR2 Core SR3 Core - PDF SR4 Core - PDF SR5 Core SR6 Core - PDF This question is more common for new players than most GMs realize. Without classes and sets of specific dynamics to choose from, some players (especially those from games like Dungeons and Dragons) have a hard time understanding what kind of character to put together and that makes character creation overall much more difficult.