The game is a co-operative third-person shooter in which four players fight against massive hordes of zombies in seven locations, including New York, Jerusalem, Moscow, Tokyo, Marseille, Rome and Kamchatka.[1]
Players can choose from seven classes: the Gunslinger (specializes in range), the Hellraiser (specializes in explosives), the Fixer (engineer), the Medic (healer), the Slasher (specializes in melee), the Exterminator (specializes in crowd control), and the Dronemaster (specializes in offensive/defensive support drones). New perks can be unlocked for each class as players continue progressing in the game.[2]
The game can support up to 1,000 enemies appearing on-screen simultaneously, and they can climb onto each other to reach players on a higher level. Players can collect different items in the battlefield, but their locations are procedurally generated.[3] In addition to fighting zombies, players also need to complete different objectives, such as escorting survivors, in each location.[4]
Each location, or episode as it is known in-game, is divided into 3-5 individual levels. After completing a level, players receive "supplies" based on a resulting defeat or victory. Supplies can be used to upgrade weapons and unlock new attachments. Aforementioned perks can also be bought for specific classes using supplies.
The game features five competitive multiplayer modes. The Player vs Player vs Zombie mode pits two teams of players against each other while the zombie hordes attack both teams. Other modes include Swarm Deathmatch, Swarm Domination, and King of the Hill.[5]
