TSR (Tactical Studies Rules)

Tactical Studies Rules (TSR) are a set of tabletop game guidelines developed by TSR, Inc., primarily used for role-playing and strategic war games, notably Dungeons & Dragons. They provide structured mechanics for resolving combat, movement, and actions within a fictional setting, ensuring consistent and fair gameplay. TSR rules include how characters and monsters interact, how to determine success or failure of actions, and how to manage resources and map movement. Essentially, they serve as a formal system to facilitate storytelling and strategic decision-making in fantasy or sci-fi game scenarios.