Data Hive

Data Hive is a Halo 3: ODST level.

Summary
The level begins as the Rookie, having followed Dare's distress signal, descends down a subway elevator shaft, into the Superintendent's Data Center deep under the city. He ends up on sub-level 7 of the complex, and has to fight his way down to sub-level 9 where Dare is currently holding out. Upon arriving there, they fight their way through a Drone hive to the core of the Superintendent to secure its core data. Inside the data core, they meet a Huragok who has combined the Superintendent's data with its own, making it extremely valuable. Buck then arrives at the complex, and they escape to the surface through heavy Covenant resistance.

Trivia
The Data Hive achievement, is unlocked after you complete the level, and therefore unlocks the Chasm Ten in Firefight mode. There is also an achievement called I Like Fire, which requires you to score 10 kills with the Flamethrower on this level, in order to be unlocked.