Guides for game masters

Prepare a two-hour RPG one-shot

A one-shot tells an adventure in a single session. With two hours to play, the hardest part is often deciding what to leave out. Use this preparation method as a starting point for your group, whether you write alone or use a tool.

1. Give the adventure a one-sentence goal

Give the characters a concrete task and a reason to act now: find someone before the last boat leaves, for example. Avoid openings that need a long explanation of the setting. Make sure every character has a reason to join in. A recognisable ending helps you finish even when the players find an unexpected solution.

2. Prepare three situations, not a fixed route

Plan an opening that calls for a decision, a complication and a final confrontation. For each, note the location, what an NPC wants and what changes if the heroes do nothing. Allow more than one way forward. Negotiation, deception or escape can move the adventure along just as effectively as combat.

3. Never hide progress behind a single clue

If information is essential, offer several ways to find it: a witness, a trace and an object might all lead to the same place. A failed roll can introduce a cost or complication instead of removing the only lead. Keep optional clues as rewards, without making them necessary to reach the ending.

4. Divide the two hours and leave some room

Try 15 minutes for characters and the goal, 30 for exploration, 30 for the complication, 30 for the finale and 15 to wrap up. Treat this as a guide, not a compulsory timer. Halfway through, identify an optional scene you can shorten. Make the final stakes clear instead of introducing another plot.

5. Keep a short reference sheet

On one page, keep the goal, NPC names, essential clues and current pressure. Review the rules you expect to need; use ready-made characters if your group prefers. After the session, ask everyone which moment stood out and what could have been clearer. Use those answers to prepare your next one-shot.

Your pre-game checklist

  • Every character has a reason to act with the group.
  • The ending does not depend on a single action or roll.
  • One situation can be shortened without breaking the adventure.
  • There is time left for the finale and player feedback.