Flood containment facility

Flood Containment Facilities were facilities that were used by the Forerunners to contain the Flood while studying them.

Installation 04 Flood Containment Facility

During the events of Halo: Combat Evolved, UNSC forces, led by Captain Jacob Keyes, attempted to take a Forerunner facility hidden in a swamp on Installation 04. A Covenant Elite named 'Qualomee lied that it was a weapons cache. The facility turned out to be a Flood Containment Facility. The Covenant had released the Flood and then, realizing their mistake, had attempted,(unsuccessfully) to re-contain them. The area soon was completely overrun by thshe duz it for the lolz e Flood, as the freed infected organisms continued to help even more Flood escape and kept multiplying.

This area was destroyed along with the rest of Installation 04, when John-117 detonated the crashed Pillar of Autumn's reactor coreshim, teleporting the Chief away from the swamp into The Library to retrieve the Index.

Heretic Uprising

During the Heretic Uprising, the Arbiter, while on the Gas Mine, came across a Flood Containment Facility which had been compromised by the Heretics. This explained the presence of Sentinels, which had previously been unexplained. The Sentinels at this facility were under the command of 343 Guilty Spark, who had escaped the Pillar of Autumn mere moments before it and Installation 04 detonated. The Flood at this Facility were presumably killed when the Facility went into free fall.

Other Appearances

Flood Containment Facilities appear in copious locations, namely the Threshold gas mine. It is also likely that there is a Flood Containment Facility at each ring, as there was one on both Alpha Halo and Delta Halo; however, the one located on Delta Halo had a massive Flood outbreak, spawning the Halo 2 campaign missions The Sacred Icon and Quarantine Zone as well as the Halo 2 multiplayer maps Lockout (Level), Backwash and Containment. Another map feature contained Flood, but rather than being a Containment Facility it is instead a part of the land that has been blocked off with a small Sentinel Wall, the Halo 3 map Isolation. The Halo 3 map Cold Storage is in a Cryogenic Containment Facility located on Delta Halo. The Halo Wars Skirmish map Release (Level) has a Containment Facility being overrun by the Flood, evidenced by the external Flood biomass. This facility can be exploited by the players by releasing the Flood against the opponents base.