Warhammer Fantasy Roleplay Fourth Edition Rulebook - Rules of Play says:
Warhammer Fantasy Roleplay takes you back to the Old World. Get the gang together, create your (anti)heroes, and set off to make your way through the vile corruption, scheming plotters and terrifying creatures intent on destruction. The Warhammer Fantasy Roleplay Rulebook contains everything you need for grim and perilous roleplaying adventures in the Old World.