Age of Sigmar: Soulbound Corebook

Welcome to Warhammer Age of Sigmar Roleplay: Soulbound. This is your first step
into the awe-inspiring and deadly lands of the Mortal Realms. One person in your group will bring the setting to life by describing the world and adjudicating your actions in it, the rest of you will explore the realms and hope to survive in a time plagued by daemons, undead, and rampaging monsters.

Soulbound is a tabletop roleplaying game, sometimes shortened to RPG or TTRPG.
If you’ve played computer or console RPGs (CRPGs), you’re probably familiar with what to expect — you’ll create your character, choosing their Species and Archetype, and then you’ll venture out into the Mortal Realms. One person
in your group is the Gamemaster (GM), who describes the world. Everyone else takes on the role of player characters (PCs). The PCs are the protagonists, and the GM is there to help narrate their actions and resolve any rules questions.