Hauptregelwerk

Hauptregelwerk is a German term used in gaming communities to denote the core rulebook of a game system. It refers to the central collection of rules that governs most play and provides the foundational mechanics used for resolving actions, combat, character development, and other core activities. The phrase underscores the rulebook’s primacy within the system, as opposed to supplemental materials or house rules.

In practice, a Hauptregelwerk is typically published as one or more volumes and serves as the authoritative source for the game’s mechanics. It is often complemented by additional books such as expansion rules, setting guides, adventures, or bestiaries. While the exact naming varies by system—terms like Grundregelwerk or Kernregelwerk are sometimes used interchangeably—the function remains the same: to establish the official framework for gameplay.

Contents commonly found in a Hauptregelwerk include core mechanics (dice systems, success thresholds, and resolution rules), character creation and advancement, attributes and skills, combat and movement rules, equipment or magic/technology systems, and a glossary or index. It may also introduce overarching concepts such as the game world’s logic, economy, or social rules, which are then elaborated in supplements.

Editions of a Hauptregelwerk may introduce changes that affect compatibility with earlier books. Players and game masters often consult errata, supplements, or house rules to address gaps or to tailor the system to their preferred play style.

See also: Regelwerk, Grundregelwerk, Kernregelwerk, Erweiterung, Hausregel.