Forerunner secondary reactor

The Forerunner secondary reactor is a generator of Forerunner origin. It is characterised by a circular structure with four pylons pointing upwards to its "chimney" and a walkway outlining the building's edge. These reactors have been found on Harvest, Arcadia, on the surface of the shield world Etran Harborage, and within its interior.

History
The Forerunner secondary reactors are reactors built and used by the Forerunners in their ground based attacks. In some battles, they had time to retreat and detonate them. On occasion they were overwhelmed by the Flood and were not able to destroy them.

By 2531, when UNSC forces from explored the surface of Etran Harborage, at least two of these reactors remained intact and operational despite the Flood's domination over the shield world's surface.

Gameplay
The Forerunner secondary reactor is a building found in Halo Wars campaign and multiplayer. It increases the tech level of any player that stations an infantry unit within it, allowing players to bypass the need to construct the UNSC reactors or Covenant temple.

Two secondary reactors could be found in the campaign level Shield World, whereas the building is much more common in Skirmish mode, typically defended by rebels, the Flood, or Aggressor Sentinels. Units garrisoned in the structure receive the same defensive bonus as they would in a deployable lookout tower. Although the building itself cannot be destroyed, the infantry inside can be killed, allowing the structure and its benefit to be contested between players.

List of appearances

 * Halo Wars