How to run your first tabletop RPG session as a GM

What a game master actually does (and doesn't)

The game master, or GM, also called the narrator, describes the world, voices the non-player characters (the NPCs: the innkeeper, the queen, the hired assassin) and decides what happens when players try something. Each player controls one player character, or PC. Everything else is yours.

What you are not: the players' opponent, a professional actor or an all-knowing referee. Your job is to keep the story moving and give everyone moments to shine. If you can't remember a rule, make a reasonable call and move on; you can look it up afterwards. The table cares far more about momentum than accuracy.

Prep: just enough, no more

The classic first-timer mistake is over-prepping: maps of the whole continent, three dynasties' worth of family trees and an NPC for every tavern. Then the players do something unexpected ten minutes in and half that work never sees the light of day. Prep situations, not scripts.

What is worth having ready

• A one-sentence premise. “The count's heirs gather to read his will, and someone doesn't want it read.” If it doesn't fit in a sentence, simplify it.
• Three or four key scenes, each with what's at stake and what ends it. Not how the players solve it; that's their call.
• Your important NPCs, each with a name, one thing they want and one trait you can play: whispers, laughs at everything, never makes eye contact.
• A list of spare names for when someone asks what the stable boy is called. It will happen.
• Redundant clues. If there's a mystery, make every important fact discoverable in at least three different ways.
• Pre-made characters. At a first session, character creation can eat an entire hour. Hand them out ready to play.

Logistics count too: print whatever you'll hand out, have snacks ready, budget time with a buffer and tell people when the game actually starts, not when to turn up.

A ten-minute session zero

Long campaigns often devote an entire “session zero” to setting expectations. For a first game, ten minutes at the start, before handing out characters, is plenty. Tell the table:

• What the story is about and its tone: serious intrigue, farce, something darker?
• How long it will run and when you'll take a break.
• How to play: “You describe what your character does and I'll tell you what happens.” If there are dice, explain only the core mechanic.
• That there are no wrong answers, and getting things wrong is half the fun.

Safety tools, the light version

They sound like a veterans' thing, but they're especially useful with newcomers. Lines and veils: lines are topics that will never appear in the game; veils are things that can happen but stay off-screen. Ask out loud or collect anonymous notes. Then there's the X-card: a card with an X on it in the middle of the table. If anyone taps it, whatever is happening gets cut or changed, no explanation needed. It's rarely used, but having it there helps people relax.

Open strong: the first fifteen minutes

The opening sets the tone for the whole night. Skip the “you're all in a tavern and nothing is happening” start. Begin in the middle of something: a letter arrives, a body is found on the stairs, a toast goes horribly wrong. Read a short, vivid description of three or four sentences and end with a direct question to one player: “You're the one who opens the letter. What do you do?”

Then run a quick round of in-character introductions: each player gives their name, how others see them and one thing they want the table to know. It breaks the ice and fixes the characters in everyone's head.

Pacing: how to run a game that never stalls

Pacing is the most important GM skill and the most obvious one when it fails. A few practical rules:

• Cut scenes as soon as they lose energy. If the conversation is going in circles, throw something in: a messenger arrives, the candles go out, a bell tolls.
• Vary the intensity. After a tense scene, give the players a breather to talk among themselves.
• Watch the clock. If you're halfway through your time and still in scene one, reveal information early or merge two scenes.
• Keep a clue ladder. If the table gets stuck, drop a subtle hint first, then a clearer one, then an obvious one if needed. Progress beats frustration.

Read the table: watch faces, not notes

Spend more time looking at your players than at your notes. The signals are easy to read: someone scrolling their phone, laughing at an unrelated joke or asking “so what do we do now?” is bored or lost. People leaning in, whispering or arguing in character means the scene is working, so let it run.

During breaks, just ask: “What are you enjoying most? Want more action or more scheming?” You don't lose authority; you're seasoning the dish for the people eating it.

Improvise without fear

Your players will do something you didn't expect. Every time. A few ways to land on your feet:

• Buy time with description. While you describe the room, you're deciding what's in it.
• Ask them back. “What does your character know about this family?” Let them build with you, then use it.
• Recycle. The NPC you'd prepped for scene three can show up now under a different name. Nobody will know.
• Write everything down. If you invent that the butler is left-handed, note it. Someone will bring it up an hour later.

If you contradict yourself, that's fine too. Correct it (“sorry, I mixed that up, it was the north tower”) or, better yet, turn it into a mystery: maybe someone was lying.

The quiet player and the spotlight hog

Drawing out quiet players

Many quiet players aren't bored; they're waiting for permission. Address their character by name, offer concrete choices rather than open questions (“Do you follow him into the corridor or stay and watch the envoy?”) and give them information only they have. A secret that only one player knows is the best invitation to join in, which is exactly why one-shots with hidden goals for every character work so well with beginners.

Handling the spotlight hog

An enthusiastic player is a gift, but they can drown out everyone else. Don't shut them down; redirect. “Great, and while you do that, what is Mirela up to in the kitchen?” Rotate the spotlight, put key clues in other characters' hands and, if needed, have a friendly private word at the break asking them to help you bring others in. It usually works first time.

End well: the finale matters more than the opening

Plan for the climax to land with at least twenty minutes to spare. An accusation, a vote, a duel, a final reveal: something that answers the night's big question. Then close each personal story with a short epilogue per player, so everyone leaves knowing their part mattered.

Finish with a quick out-of-character round: favourite moment, the secret nobody uncovered, what you'd change. That's how you get better for next time, and there will be a next time.