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Archives of Nethys

Archives of Nethys

Pathfinder RPG (1st Edition) Pathfinder RPG (2nd Edition) Starfinder RPG

Rules Index | GM Screen | Player's Guide
Player Core / Chapter 1: Introduction / What is a Roleplaying Game?

The Game Master

Source Player Core pg. 5 2.0
While the other players create and control their characters, the Game Master (or GM) is in charge of the story and world. The GM describes all the situations player characters experience in an adventure, considers how the actions of player characters affect the story, and interprets the rules along the way. The Game Master uses the rules and advice found in Pathfinder GM Core.

The GM can create a new adventure—crafting a narrative, selecting monsters, and assigning treasure on their own—or they can instead rely on a published adventure, using it as a basis for the session and modifying it as needed to accommodate their individual players and the group's style of play. Some even run games that combine original and published content, mixing both together to form a new narrative.

Being the GM is a challenge, requiring you to adjudicate the rules, narrate the story, and juggle other responsibilities. But it can also be very rewarding and worth all the work required to run a good game. If it's your first time running a game, remember that the only thing that matters is that everyone, including you, has a fun time. Everything else will come naturally with practice and patience.

The First Rule

The first rule of Pathfinder is that this game is yours. Use it to tell the stories you want to tell, be the character you want to be, and share exciting adventures with friends. If any other rule gets in the way of your fun, as long as your group agrees, you can alter or ignore it to fit your story. The true goal of Pathfinder is for everyone to enjoy themselves.

Dice

Pathfinder requires a set of polyhedral dice. Each die has a different number of sides—four, six, eight, or more. When these dice are mentioned in the text, they’re indicated by a “d” followed by the number of sides on the die. Pathfinder uses 4-sided dice (or d4), 6-sided dice (d6), 8-sided dice (d8), 10-sided dice (d10), 12-sided dice (d12), and 20-sided dice (d20). If you need to roll multiple dice, a number before the “d” tells you how many. For example, “4d6” means you should roll four dice, all 6-sided. If a rule asks for d%, you generate a number from 1 to 100 by rolling two 10-sided dice, treating one as the tens place and the other as the ones place.