Natural Selection Wiki
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Introduction

Alien Tunnels connect to points on the map via a tunnel. The length of the tunnel is fixed and does not change with the distance between entrances.

Tunnels are limited to 1 per Hive (up to 4 total) and each Tunnel is limited to 2 entrances. Both teams can use the Tunnel but Marines suffer a corrosion effect that deals damage to their armor as long as they are in the tunnel.

Once the Tunnel has been upgraded to an Infested Tunnel, both entrances will become Infested Tunnels. As long as one entrance survives, both entrances will be Infested, but if both entrances are destroyed, they must be upgraded to Infested Tunnel again.

A Tunnel entrance must be placed on Infestation, but will not lose hitpoints if it is no longer on Infestation. Tunnel entrances will only grow or be built by a Drifter on Infestation, but Gorges can build Tunnels that are no longer on Infestation.

Tunnel
Cosmetic Variants:

Tunnel.png

Normal Tunnel

Abyss tunnel.png

Abyss Tunnel

Kodiak tunnel.png

Kodiak Tunnel

Nocturne tunnel.png

Nocturne Tunnel

Reaper tunnel.png

Reaper Tunnel

Shadow tunnel.png

Shadow Tunnel

Toxin tunnel.png

Toxin Tunnel

Unearthed tunnel.png

Unearthed Tunnel

Alien method of fast travel.
Becomes Infested Tunnel when 100% Mature
Kharaa.png Kharaa
Team Resources
Marines res.png 8
Health
1000 (1400)
Armor
100 (250)
Abilities:
Tunnel Exit, Tunnel Entrance, Collapse Tunnel
Tech Requirements:
Must be placed on Infestation
Builds From: Alien Commander
Buy From: Basic Tab
Hotkey:
V
Limit: 1 set per Hive 4 sets total
Maturation Time: 135 seconds
Infested Tunnel
Cosmetic Variants:

Tunnel.png

Normal Tunnel

Abyss tunnel.png

Abyss Tunnel

Kodiak tunnel.png

Kodiak Tunnel

Nocturne tunnel.png

Nocturne Tunnel

Reaper tunnel.png

Reaper Tunnel

Shadow tunnel.png

Shadow Tunnel

Toxin tunnel.png

Toxin Tunnel

Unearthed tunnel.png

Unearthed Tunnel

Alien method of fast travel, spreads Infestation
Kharaa.png Kharaa
Team Resources
Marines res.png 8
Health
1400
Armor
250
Abilities:
Tunnel Exit, Tunnel Entrance, Collapse Tunnel, spreads Infestation
Tech Requirements:
Must be placed on Infestation
Builds From: Alien Commander
Buy From: Basic Tab
Hotkey:
V
Limit: 1 set per Hive 4 sets total
Maturation Time: 135 seconds


Abilities

Tunnel Exit

Tunnel Exit
Tunnel Exit.png
Builds a Tunnel entrance connected to this one
Hotkey
S
TRes Icon team resource neutral.gif 6
Requires Tunnel entrance is not connected, Must be placed on Infestation


Tunnel Entrance

Tunnel Entrance
Tunnel Entrance.png
Moves this Tunnel entrance
Hotkey
S
TRes Icon team resource neutral.gif 6
Requires Tunnel entrance is connected, Must be placed on Infestation


Collapse Tunnel

Collapse Tunnel
Consume.png
Collapses this Tunnel entrance
Hotkey
V
Requires Tunnel


Variants

There are currently 8 variations of the Tunnel skin available to Players

Info.png Info:  • Not all variants are available for purchase.

          • Skins are purely cosmetic and offer no augmented or additional stats in-game.

Camouflage variants & availability
Variant Description Acquisition Notes
Normal Default camouflage. Provided with game. N/A
Abyss Blue highlights and glow. Can be bought in the Customization Screen in-game. Released with the Merry Gorgemas! update (Build 336).
Kodiak Green glow, jungle effect skin. Can be bought in the Customization Screen in-game. Released with the Merry Gorgemas! update (Build 336).
Nocturne Beige skin with purple highlights and a purple glow. Can be bought in the Customization Screen in-game. Released with the Merry Gorgemas! update (Build 336).
Reaper White skin, black features and yellow glow. Can be bought in the Customization Screen in-game. Released with the Merry Gorgemas! update (Build 336).
Shadow Dark blue/purple skin, red glow. Can be bought in the Customization Screen in-game. Released with the Merry Gorgemas! update (Build 336).
Toxin Black with green highlights, spots and glow. Requires Catalyst Pack DLC. Released with the Catalyst update (Build 324).
Unearthed Purple tint and glow, crystalline look for Hive and Harvester. Was rewarded for playing Unearthed upon its initial release. Can be bought in the Customization Screen in-game. Released with the update (Build 327).


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