Last Exit (Level)
From Halopedia, the Halo wiki
Last Exit is a Firefight map to be included in Halo 3: ODST. With the map also comes the achievement for scoring 200,000 or more points in Firefight. See Achievement: Last Exit.
It is a medium symetrical map with a big roundabout in the middle area and in the very middle is a small structure, you spawn inside a building and there is 4 health packs behinds you around each side, if you exit the building go to the left to find a sniper rifle and to the right to find a rocket launcher.
This map is just about big enough for the covenant to drop ghost, mainly on the 2nd wave of each round.