This massive 200-meter concrete overflow tunnel is submerged under four feet of dark, murky water, creating a tense and claustrophobic environment for tactical combat. The layout features a long, echoing corridor punctuated by industrial debris and rusted pipes that can serve as precarious cover. The primary obstacles are three heavy, computerized security doors that require hacking or explosives to bypass, creating natural chokepoints and dividing the linear map into distinct engagement zones. For VTT sessions, the dark, stagnant water offers severe movement penalties and obscures submerged hazards or hidden enemies. Lighting is sparse, relying on emergency red strobes near the security blast doors and the players' own light sources. Game masters can utilize the computerized doors for interactive hacking puzzles or dynamic environmental hazards, such as sudden water surges or electrical discharges from exposed wiring.
