Rogue automatons march on the city boilerworks. Ironclads shrug off bullets — pierce them with Tesla or Longrifle. Zeppelins sail over ground fire. Destroyed machines feed the boiler gauge: vent it as Overdrive or an airship Bombardment. Keys 1–5 build · Esc cancels · Space starts waves.
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⚔️ Versus
Both engineers defend their own works — endless waves, no final bell. Spend gold to sabotage: send extra automatons marching into your rival's vale. Last boilerworks standing wins.