The Core Rules explain everything you need to play to play Warhammer 40,000. Moving, shooting, using psychic powers, charging, fighting and morale tests are covered, giving you the basic framework to play with. You can play a game using only these 8 pages, bolting on more advanced and complex rules when you and your opponent are ready. Advanced Rules are a selection of rules and expansions that can be used to play with your miniatures the way that you want to. With these rules, there are always new challenges to face, new battles to fight, and new ways to play.