Highrise

Highrise is a map featured exclusively in Survival Mode as part of the unfinished campaign, Dam It. The map does not appear in the main campaign itself, and the setting is very different from the main campaign. The map consists of the main lobby of a skyscraper, with a couple of higher floors accessible via stairs. The building appears to have been used as some form of Survivor community, as can be seen from the various banners and signs hanging from the higher balconies.

Gameplay
The map was designed purely for Survival mode, as such the only goal is to survive for as long as possible, rather than reaching a safe room or gathering gas cans as with Scavenge Mode. The Survivors have as much time as they want to set up before flipping a switch on the elevator to trigger the horde. As such, it is impossible to survive indefinitely, and the round must always end with the death of all Survivors.