What's New

This app has been updated by Apple to use the latest Apple signing certificate.

* Fixed a display issue that some players were experiencing.

It's every man for himself in an all new special event, Virus Samples.

The research corporations want virus samples from the undead and they're prepared to majorly reward whoever can bring in the most. Compete against your teammates to collect the most virus samples from defeated zombies and secure your place on the leaderboard for some big strongbox prizes!

Check the News section to find out when this exciting event is running so you can join in and get yourself some awesome gear.

App Description

Purge the undead! Awesome upgradeable guns and armor, unique class skills, and 4 player co-op! Play the most intense zombie shooter on mobile, from the makers of Bloons TD 5.

A virus outbreak on a distant trans-federation planet unleashes horrors from humanity's past. A powerful, rapidly growing zombie horde threatens the very existence of humankind, and the only ones capable of fighting back are the highly skilled, highly weaponized special forces of the S A S. Choose from 3 unique character classes, maximize the fully customizable skill tree, and select from hundreds of weapons and armor pieces to build the ultimate zombie killing hero. Play dynamic, challenging levels in single player or 4 player cooperative multiplayer and give our ravaged civilization its last best hope for survival.

Zombies swarm the screen, exploding into bits under your hail of bullets. Each of the 17 unique zombie types have special attacks and behavior, and they can evolve - manifesting terrifying new powers as you progress through the game. And just when you think you've beat them all, savage boss zombies hunt you down, puking out acid worms or storming after you in rage mode. Learn their strengths and weaknesses as you lead the action across 7 story-driven maps with varying victory conditions.

Quickmatch with up to 3 other players of similar level and use the custom skills and weapons chosen by all players to form an effective fire team. Coordinate auto-turret placements, high level room-clearing powers like Assault Team, Aerial Bombardment, and Zombie Antidote, and move physics objects to create temporary cover while you paint the room red.

Over 160 incredible guns and armor pieces are locked up tight inside increasingly rare strongboxes that you can find in secret rooms or on the mangled remains of your enemies. Your loadout includes a pistol and two rifle class weapons - choose from fast firing submachine guns, devastating shotguns, high damage assault rifles, brutal machine guns, flamethrowers, rocket launchers, lightning guns, and more. Armor up for protection against physical, thermal, and chemical attacks, then round out your arsenal with auto-turrets, grenades, and special high damage ammo to rip through the undead before they rip through you.

The Assault, Medic, and Heavy Gunner classes each have unique upgrade trees, giving each character 19 skills to customize. Hundreds of guns and armor pieces have a range of grades and a powerful RED version when you reach high levels. In addition you can add powerful augmentations to your guns and gear which enhance core properties like damage and rate of fire, but can also improve reload time, resist damage, and heal.

Download for free and play SAS: Zombie Assault 4 now!

Currently in development - private matches and events. Please be patient and know that private matches is a top priority.

Please Note: SAS: Zombie Assault 4 is free to download and play (aside from internet, carrier, data, device, and other services for which the player is financially responsible), but some in-game items can be purchased with real money. You can turn off the payment feature by disabling in-app purchases in your device's settings.
SAS: Zombie Assault 4 is recommended for players 12 years of age and older, and the fantasy violence, gibs, and zombie blood are to be expected given the survival theme. We have included a "Gore" setting on the Options screen specifically for young or sensitive players, and this removes the blood and gibs when Gore is toggled Off.

iPhone Screenshots

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SAS: Zombie Assault 4 screenshot 1 SAS: Zombie Assault 4 screenshot 2 SAS: Zombie Assault 4 screenshot 3 SAS: Zombie Assault 4 screenshot 4 SAS: Zombie Assault 4 screenshot 5

iPad Screenshots

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SAS: Zombie Assault 4 screenshot 6 SAS: Zombie Assault 4 screenshot 7 SAS: Zombie Assault 4 screenshot 8 SAS: Zombie Assault 4 screenshot 9 SAS: Zombie Assault 4 screenshot 10

App Changes

  • October 24, 2014 Initial release
  • November 07, 2014 New version 1.0.1
  • December 20, 2014 New version 1.1
  • February 26, 2015 New version 1.2
  • April 30, 2015 New version 1.3
  • June 08, 2015 New version 1.4
  • September 09, 2015 New version 1.5
  • October 07, 2015 New version 1.5.1
  • November 22, 2015 New version 1.6
  • December 10, 2015 New version 1.6.1
  • January 17, 2016 New version 1.6.3
  • March 25, 2016 New version 1.7
  • July 08, 2016 New version 1.8
  • November 06, 2016 New version 1.9.1