The citadel is a Covenant base structure, and the Covenant equivalent of the UNSC Firebase in Halo Wars.[1] It contains a Command Center, seven building sites, and four turret foundations.
When a new base has been claimed in standard Skirmish or multiplayer mode, the beginning base facility is called the Outpost. It includes a Command Center and three building sites, but no turret foundations. Outpost can be upgraded to a Keep, which includes a Command Center, five building sites and four turret foundations, and can be upgraded to a citadel.
Summary
The citadel is a basic command structure with defenses such as Wraiths, Ghosts, and Banshees, and can also be defended by base turrets. It also has a similar underground garage to the UNSC's Firebase. These provide field command facilities for invading or defending Covenant Armies. Much like its UNSC equivalent, it possesses 7 expansion "sockets" for more structures for research, unit production and defense.
The available buildings that the citadel can provide are a Hall, Temple, Factory, Summit, Shield Generator, and a Warehouse. It is colored a deep purple, like most Covenant buildings, vehicles, and ships.
Expansions
Units produced and available upgrades
- Scarabs
- Honor Guard Elites (Prophet of Regret only)
- Cloaking Ability
- Personal Shield
- Brutes (Brute Army Commander only)
- Jump Pack
- Electric Shot
- Suicide Grunts (Arbiter only)
- Zeal
- Defile
Trivia
- Unlike the Firebase, the Citadel's buildings seem to be built by an orbital beam. The UNSC constructs their buildings underground.
- In "Origins II", at the moment when the Covenant and humanity fight together against the Flood, one can see a Summit and a Citadel consumed by the Flood.
List of appearances
- Halo Wars (First appearance)
- Halo Legends
- Halo: Blood Line