Halo 3 - Master the Multiplayer

NARROWS (download guide)

Bungie says: "Without cooling systems such as these, excess heat from The Ark's forges would render the construct uninhabitable. 2-8 players."

GamesRadar translates: Want to get from one side of this symmetrical map to the other? Avoid the crowded upper bridge and sneak through on the lower half. The Man Cannons are fast, but the other team will easily see you coming.