One single Flood spore can destroy a species.
~ Rtas Vadum explaining his decision to glass New Mombasa.

The Flood are one of the two main antagonist groups in the Halo video game series, the other being the Covenant. They are major antagonists in Halo: Combat Evolved, the secondary antagonists of Halo 2, and the main antagonists in Halo 3 alongside the Covenant Loyalists. They are an ancient alien race of parasites capable of assimilating any other organic life-form and turning them into flood zombies, and if left unchecked could consume all other sentient life in the universe. Thousands of years ago the Forerunner race were at war with the Flood and created the Halo space installations as a last resort to kill all other life in the galaxy so the Flood would starve to death. It is the goal of the Covenant to activate the Halos, which they mistakenly believe will send them on a "Great Journey" to godhood.

The Flood are all controlled by an intelligent hive mind called the Gravemind, who often speaks through his Flood zombies. Gravemind and the Flood are seemingly destroyed once and for all at the end of Halo 3, but they could return again eventually.



  • Gravemind
  • Proto-Gravemind
  • Juggernaut Form (cut)
  • Pure Form
    • Stalker Form
    • Ranged Form
    • Tank Form
    • Infector Form
    • Transport Form
    • Stealth Form
  • Combat Form
    • Human Combat Form
    • Sangheili Combat Form
    • Jiralhanae Combat Form
    • Kig-yar Combat Form
    • Unggoy Combat Form
    • Active Camouflage Combat Form
  • Carrier Form
    • Shielded Carrier Form
    • Combat Carrier Form
  • Infection Form


  • Jacob Keyes
  • Prophet of Regret
  • Prophet of Truth
  • Wallace Jenkins

Mission Appearences

Halo: Combat Evolved

  • 343 Guilty Spark
  • The Library
  • Two Betrayals
  • Keyes
  • The Maw

Halo 2

  • The Oracle
  • Sacred Icon
  • Quarantine Zone
  • High Charity

Halo 3

  • Floodgate
  • The Covenant
  • Cortana
  • Halo 

Halo Wars

  • Anders Signal
  • The Flood
  • Shield World
  • Cleansing
  • Beachhead
  • Reactor


           Halo Villains

The Flood | Huragok | Mgalekgolo | Jiralhanae | Kig-Yar | Sangheili | San Shyuum | Unggoy

Covenant Empire
Covenant High Council: Prophet of Truth | Prophet of Mercy | Prophet of Regret
Covenant Sangheili: Ardo 'Moretumee | Bako 'Ikaporamee | Field Marshal | Harka | Lat 'Ravamee | Luro 'Taralumee | Merg Vol | Ontomee | Re'gish Wamik | Rho 'Barutamee | Ripa 'Moramee | Rtas Vadum | Thel 'Vadam
Covenant Jiralhanae: Lepidus | Parabum | Tartarus

Storm Covenant
The Didact | Jul 'Mdama | Gek 'Lhar | Parg Vol | Kitun 'Arach

Cortana | Warden Eternal | Guardians | Prometheans

The Banished
Atriox | Decimus | Let 'Volir

Office of Naval Intelligence
Jameson Locke | James Ackerson

Jerald Mulkey Ander | Robert Watts

343 Guilty Spark | Commissioner Kinsler | Gravemind | Heretics (Sesa Refumee)