One-Shot Adventure That Actually Fits Three Hours

One-shots that run five hours and end on a cliffhanger defeat the point. This designs a full adventure in three tight acts: a 15-minute hook, three modular middle scenes you can run in any order, and a 30-minute climax. Timed so it lands inside one evening with your party, your system, your theme. Run it and go home.

Design a complete one-shot adventure for {PARTY_SIZE} players using {SYSTEM}. The theme is {THEME} (e.g. heist, rescue, mystery). Structure the adventure in three tight acts: Act 1: a 15-minute inciting scene that establishes stakes and player objectives; Act 2: three modular scenes (one social, one exploration, one combat) that can be run in any order and each take 45 to 60 minutes; Act 3: a 30-minute climax with two possible endings based on player choices. For each scene include: a GM-facing summary, one key decision point, and a 'skip forward' instruction if time is short. Also provide a pre-generated party of {PARTY_SIZE} characters as brief bullet-point stat blocks. The whole adventure must run in under 3.5 hours including breaks.