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Map Name servicetunnel
BSP Name infra_c7_m1_servicetunnel
Stalburg Map servicetunnel
Photo Spots 16
Corruption Spots 6
Repair Spots 2
Mistake Spots 4
Geocaches 1
Water Flow Meters 0
Connected Maps
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An alleyway and several derelict tunnels near Walter Square that connect directly underneath Walter Tower. This map contains another action sequence and provides access to an optional map.

Story[edit | edit source]

Prior to the events of INFRA, Alex Hartman rigged the supports and walls underneath Walter Tower with dynamite provided by Eric Kleinmann. Hartman recorded an audio log to taunt Jeff Walter and trigger the dynamite to explode should he ever return to his company's headquarters. This never came to pass however, and the trap was left untouched for decades. Several documents concerning the construction inspection of Obenseuer, (more commonly referred to as "Open Sewer") were discovered by someone, and revealed that the tenement buildings were built with subpar materials, and should of been demolished, but the city planning committee continued the construction project anyway.

Mark escapes from Central Station and finds his way to the surface in an alleyway. With no way access to the streets, Mark enters another sewer, and realizes he must hike the rest of the way to the office. The interconnected tunnels take Mark through a partially flooded electrical station, and underneath Walter Co. headquarters. The trap demolishes the supports of the building and the room begins to collapse. Mark narrowly escapes being crushed, but becomes trapped underground yet again. He can explore the area to get access to upper levels of the tower, but eventually comes across a mysterious bunker deeper underground. Mark restores power to the entrance hall, and without any other way to proceed, he enters the bunker.

Locations[edit | edit source]

Office Room[edit | edit source]

A small enclosed office for an unknown company that contains many archives and blueprints. Someone ordered the documents here to be disposed of, but hadn't managed to throw out all of them.

Tunnels[edit | edit source]

The underground tunnels are part sewer system, part service tunnels. The sewers provide access to an underground electrical substation. The transformers in here have been poorly maintained and have several exposed cables in pools of water.

Beneath Walter Tower[edit | edit source]

Service tunnels provide access to Walter Tower's subsurface. Hartman's trap is unavoidably triggered here. Further inside are storerooms, and a functional funicular lift leading to the bunker's entrance. Outside the bunker is the door control room, and a power substation for the bunker.

Achievements[edit | edit source]

Hidden Achievements[edit | edit source]

Icon Name Description
Ach A bad case of the mondays.jpg Beer Master Complete the beer challenge.

Gallery[edit | edit source]

Documents[edit | edit source]

Trivia[edit | edit source]

  • The second breaker in the bunker's power station will only be usable if Mark connected the Hammer Valley Dam to its grid.
  • One of the storerooms underneath Walter Co. contains several bottles of Osmo Olut left by a "Beer Master" that can be drunk for an achievement.