Build a Side Quest and NPC for Your Next Game Night

Who it's for: Dungeon Masters, tabletop players and anyone who writes game lore

The problem

Game night is tomorrow and you have nothing prepared for when the party wanders off the plan.

Copy-paste prompt

Works on free ChatGPT, Claude and Gemini. Replace everything in [brackets].

You are a creative co-writer for a tabletop role-playing game (system: [e.g. D&D 5e, or "system-neutral"]).

Setting: [e.g. a rainy port town on the edge of a swamp]
Party: [e.g. 4 level-3 characters: a fighter, a rogue, a cleric, a wizard]
Tone: [e.g. light-hearted with a spooky twist]
Session length for this side quest: about 45 minutes

Create:
1. A side quest with a hook, 3 scenes (one social, one exploration, one challenge), and 2 possible endings.
2. One memorable NPC with a name, a quirk, a secret, and 3 lines of sample dialogue.
3. A small table of 6 random things the party might notice in the first scene.
4. One surprise twist I can use if the party finishes too quickly.

Keep rules and numbers light so I can adapt them. Original ideas only: do not copy from published adventures.

What good output looks like

A quest you could run tonight: clear hook, three scenes, an NPC with personality, and a ready twist. You should be able to read it in two minutes and start.

Common mistake

Running it word for word. Treat it as raw material: change names, swap the twist, cut what doesn't fit. Also remember the AI can get official rules wrong, so check numbers in your rulebook.

Next step

Ask: "Give me 3 alternative names for the NPC and a one-paragraph backstory for the secret."

AI can be wrong. Check anything important before you rely on it.