This map is broken into 4 parts, although it's only represented by three rounds as The Corridor is not counted: * Bonus Objective: Finish the round with 80% or more HP for the Energy Tubes |-| The Corridor= This area leads down from the outer space to the Chemical Plan. The goal is straightforward: Kill all zombies guarding this area. |-| Chemical Plan= Soldiers will face the boss Wesley Longbill here. Along with avoiding his attacks, care must be taken to defuse his C4 before it explodes, or the Energy Tubes will take damage and eventually be destroyed, failing the mission.