City Survival 2 is much like the original, except here you get to choose a class before jumping into the fray. The classes are explained to the player via in-game Datapad.
This is a survival map, meaning you will most likely burn through all allotted lives for the map to end. As the title suggests you are battling in a city like area, comprised solely of custom geo. There are plenty of ledge grabs scattered around to help position yourself above the action and find some beneficial items. The map has two Quads and a Haste powerup. Possibly there are others, but I did not find them. There is also BFG ammo scattered around, so there is likely a BFG hidden somewhere as well.
The map includes a tablet mechanic that allows the host player to summon in friendly demons for assistance at regular intervals. There are also intermittent boss fights to deal with as well.