A dungeon that
runs on its machinery

Start with a concrete objective

The party needs to reach Vordanne through a closed quarantine wall. Official access through the Bronze Wardens and illicit access through the Crimson Sun offer different approaches. Both bring the characters into the House of Three Wheels.

Telegraph before resolving

The September GM manual makes the rule explicit: describe the steam lane, the next wave’s direction or the site of a chemical release before it activates. Keep the announced target stable after the players commit to an action.

That creates a learnable encounter. The party can reposition, take cover, rescue someone or change a mechanism with information they actually have.

Physical plans work literally

Rescue is an action, not an arbitrary sequence of additional checks. A rope, a stopped drive, a blocked shutter or suitable magic should change the scene in the way the successful plan establishes.

Essential information is not locked behind a roll. Inspection reveals the main route and required information; checks can provide speed, convenience or an extra clue.

Preparation feeds the final encounter

The White, Red and Blue wings give the party separate problems to solve before the Distribution Hall. Rescued specialists, instructions and prepared machinery change what the group can do when the three wheels and the Castellan become the focus.

The mechanical arrangement supports split roles and changing priorities. Players can alter the station while fighting within it; reducing the boss’s hit points is only one part of the problem.

Write the module so the GM can run it

The manual opens with a 15-minute preparation guide and a realistic stopping point. Player handouts are separate from the GM’s secrets. Canonical plans specify visible geometry; the adventure text specifies mechanisms, hidden links, states and timings.