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About SAS: Zombie Assault 4
SAS: Zombie Assault 4 is set on a distant trans-federation planet, where a virus outbreak unleashes horrors from humanity’s past. A rapidly growing zombie horde threatens humankind, and special forces are sent to fight it. Choose a character class, customize its skills and equipment, and take on dynamic levels alone or in four-player co-op.
Story and enemies
The game follows a story across seven maps, each with varying victory conditions. It features 17 types of zombies, each with special attacks and behavior. As you progress, zombies can evolve new powers, while boss zombies hunt you down with attacks such as acid worms and rage-fuelled charges.
Classes and skills
Choose from three classes: Assault, Medic and Heavy Gunner. Each has a unique upgrade tree, with 19 skills to customize for each character.
Weapons and equipment
More than 160 guns and armor pieces are available, with different grades and powerful RED versions at high levels. You can find strongboxes in secret rooms or on the remains of enemies. Your loadout includes a pistol and two rifle-class weapons, with options such as submachine guns, shotguns, assault rifles, machine guns, flamethrowers, rocket launchers and lightning guns.
Armor protects against physical, thermal and chemical attacks. You can also equip auto-turrets, grenades and special high-damage ammunition, and add augmentations to guns and gear to improve properties such as damage, rate of fire, reload time, damage resistance and healing.
Four-player co-op
In co-op, you can use Quickmatch to join up to three other players of a similar level. Coordinate your team’s skills and weapons, place auto-turrets and use room-clearing abilities such as Assault Team, Aerial Bombardment and Zombie Antidote. You can also move physics objects to create temporary cover.
Frequently asked questions
Yes. SAS: Zombie Assault 4 is free to play on Steam, so there is nothing to buy to start playing.
The minimum requirements for SAS: Zombie Assault 4 are: Windows 7, Intel HD Graphics, 1 GB RAM, 512 MB storage. It also runs on macOS. The recommended specs are in the System requirements section.
Yes. SAS: Zombie Assault 4 has multiplayer and a single-player mode. It supports online co-op and online PvP. Players on different platforms can play together.
Yes. Valve rates SAS: Zombie Assault 4 as Verified on the Steam Deck: it runs well out of the box.
Yes. SAS: Zombie Assault 4 is the full base game. You need nothing else to play it.











