Necromaton

Necromaton comes with both single player and multiplayer missions which allow you and a couple of your friends to embark on dangerous quests in various locations overrun by zombies.
To get acquainted with the basic controls and gameplay features, you should play the tutorial mission before choose one of the available single player scenarios.
Speaking of scenarios, for the moment there's only a couple of them as the game is still in active development with more to follow shortly. Scenarios give players a main goal with multiple smaller objectives to complete during each mission.

Choose your class and get ready to face the enemy

Before starting each mission, you will have to choose a soldier division. For the moment there's only the Marines and Demolitions divisions, with BlackOps and Cybernetics to be added in the near future.
Each class has its own signature weapons, for example as a demolitions guy you will be able to use a rocket launcher or a flamethrower to dispose of your enemies.
As you kill more enemies, your character will level up giving you skill points that can be used to unlock cool new abilities, such as, frag grenades, stim packs, and small boosts etc.
The game also features a co-op multiplayer mode in which you and three other friends will be able to tackle the available missions while trying to complete the main objective before finding yourselves overwhelmed by the enemy.
Necromaton has still a long way to go before it sees the final build number but, for now, you can get a taste of what's to come by playing the two available scenarios.