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State of Flux

Train Tunnel Network

A subterranean metro-style station system with hostile Tunnel Dwellers, workcart travel, and consistent underground component farming.

Train Tunnel Network

Overview
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The Train Tunnel Network, often referred to as the Metro or Underground Stations, is a subterranean monument system that allows fast travel across the map using Low Grade Fuel.

It connects multiple underground stations through rail tunnels and functions separately from the above-ground rail network, though some maps include transition links.

For the full surface-plus-underground transport overview, see Train Rail Network.

General Info
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  • Multiple underground stations across the map
  • Marked on the map by a white circular icon
  • Elevator access to underground platforms
  • Requires Low Grade Fuel to operate trains
  • Contains hostile NPCs
  • Not a safe zone

Layout
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Surface Entrance
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Each station has:

  • A marked map icon
  • Underground stair access or elevator
  • Entry area with abandoned sleeping bags and furniture

After descending via elevator or stairs, the route reaches the main platform area.

Platforms
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Each station contains:

  • Train platform
  • Barricades across tracks
  • Multiple hostile NPCs
  • Loot containers

Platforms are connected by long tunnel corridors.

Mid-Tunnel Sections
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Between stations, groups of NPCs patrol the tunnels.

These areas:

  • Contain smaller loot clusters
  • Have limited cover
  • Often spawn groups of three NPCs

Tunnel Dwellers
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Tunnel Dwellers are hostile underground NPCs.

Common traits:

  • Equipped with M92 Pistol or M39 Rifle
  • Drop components, ammunition, and construction items
  • Approximately five per station platform
  • Smaller patrol groups between stations

They aggressively engage intruders entering platforms or tunnels.

Underground Train
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The underground train, commonly referred to as the Workcart, is used for fast travel.

Fueling
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  • Uses Low Grade Fuel
  • Fuel storage located behind cockpit

Controls
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  • W: Forward (Low, Medium, High)
  • S: Reverse or slow down
  • A or D: Left or Right at track splits

Overheating
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Remaining at high speed for too long causes overheating:

  • Warning sound
  • On-screen WARN indicator
  • Failure to reduce speed can result in explosion

Platform Barricades
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Barricades across station tracks can be broken by driving through them with the train.

Loot
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Common loot found underground:

  • Military Crates
  • Standard Loot Crates
  • Tool Boxes
  • Scrap
  • Components
  • Ammunition
  • Tools

Loot density is moderate and spread across stations and tunnels.

Strategy and Meta
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The Train Tunnel Network provides:

  • Fast underground travel
  • Consistent component farming
  • Structured PvE encounters
  • Reduced exposure compared to surface travel

Risks include:

  • Tight corridors
  • Limited escape routes
  • Overheating train
  • Limited cover at platforms

Clearing platforms before moving between stations is recommended.

The Train Tunnel Network is a subterranean travel and farming system connecting underground stations across the map. It offers structured PvE encounters, reliable component loot, and efficient long-distance travel when properly fueled and managed.

Events at Location
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  • No location-specific events currently linked.