Interception Tunnels draft

Part of the Buildings guide

Limited Can only build one per celestial body (planet, moon, asteroid). What Unique and Limited mean

Built on
Barren Planets
Workforce
3 Population Mobilized
Unlocked by
Autonomous Drills
Levels
5
Sieges
Twice as likely to be damaged as most buildings
Interception Tunnels12345
Interception Tunnels
3 Population Mobilized
Limited
Defense+0.4 × Local PopulationDefense
Defense+0.8 × Local PopulationDefense
Defense+1.2 × Local PopulationDefense
Defense+1.6 × Local PopulationDefense
Defense+2 × Local PopulationDefense
800 Production9,750 Credit
2,790 Production22,880 Credit
8,370 Production37,180 Credit
22,320 Production53,625 Credit
55,800 Production71,500 Credit

Levels

Every level above 1 is an upgrade. See upgrades for what the requirements mean.

Level Credit Credit cost Production Production cost Requires Effects
1 9,750 800 Autonomous Drills, Central Hub level 1 +0.4 Defense per Local Population
2 22,880 2,790 Central Hub level 2 +0.8 Defense per Local Population
3 37,180 8,370 Central Hub level 3 +1.2 Defense per Local Population
4 53,625 22,320 Central Hub level 4 +1.6 Defense per Local Population
5 71,500 55,800 Central Hub level 5 +2 Defense per Local Population

Unlocking

Unlocked by the patent Autonomous Drills. A patent can only be bought once the one above it is owned. Its path from the root of the patent tree:

  1. Holographic Storage System Holographic Storage System
  2. Controlled Environment Controlled Environment
  3. Controlled Environment II Controlled Environment II
  4. Autonomous Drills Autonomous Drills

Numbers shown for Legacy games. Other speeds: Tactic Flash