# SAS: Zombie Assault 4

> Intense co-op zombie shooter with RPG-style upgrades and loot. (iPhone/iPad app by Ninja Kiwi.)

- Source: https://appshunter.io/ios/app/sas-zombie-assault-4/id899159669 (this page in markdown: same URL + `.md`)
- Developer: [Ninja Kiwi](https://appshunter.io/developer/386241773)
- Category: Games, Entertainment, Action, Role Playing
- Price: Free with in-app purchases
- Rating: 4.70/5 from 21,924 App Store ratings · 583 written reviews indexed
- Age rating: 12+
- Requires: iOS 12.0 · 171 MB
- Languages: American English
- Released: 2014-10-23
- Data updated: 2026-08-27
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/sas-zombie-assault-4/id899159669/reviews.md

## What is SAS?

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.

INTENSE ACTION
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.

UNBEATABLE 4 PLAYER CO-OP
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.

HEAPS OF EPIC LOOT
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.

AMAZING RPG-STYLE UPGRADES
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.

## Key features

- Upgradeable guns and armor
- Unique class skills
- 4 player co-op multiplayer
- 17 unique zombie types
- 7 story-driven maps
- RPG-style skill trees
- Hundreds of weapons and armor pieces

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Promethium Strongboxes x 5 | $4.99 | one-time |
| Wad of SAS4 Creds | $0.99 | one-time |
| Officer's Pay | $4.99 | one-time |
| Revive Tokens x 3 | $0.99 | one-time |
| Reset Skills | $2.99 | one-time |
| Starter Pack | $2.99 | one-time |
| Skilled Veteran's Pack | $7.99 | one-time |
| Nantonium Strongboxes x 5 | $8.99 | one-time |
| Black Key | $1.99 | one-time |
| Epic Pack | $19.99 | one-time |
| Nightmare Pack Sale | $17.99 | one-time |


## What do users think of SAS?

Overall sentiment: positive

**Pros**

- 👍 Fun and entertaining game
- 🚀 Minimal ads
- 🔒 Secure and stable
- 💡 Unique gameplay and classes

**Cons**

- 🐛 Bugs and glitches
- 🔍 Lack of content updates
- 🧠 Repetitive gameplay
- 💰 Expensive in-app purchases

**Commonly reported bugs**

- Zombies getting stuck in walls
- Missions not ending properly
- Graphical issues and performance problems
- Account/progress loss issues

**Most requested features**

- More maps and missions
- New game modes and events
- Crafting and customization options
- Improved multiplayer functionality
- Ability to earn premium items through gameplay

## Recent user reviews (10 of 583)

All indexed reviews: https://appshunter.io/ios/app/sas-zombie-assault-4/id899159669/reviews.md

### 5/5 — My obsession

*2026-08-20, version 2.2.2*

I love the game. I love the guns. So much variety and creativity. I love upgrading the guns. I love seeing the process of my guns getting stronger. The unlocks of mastery and the upgrade unlocks from gun collection just gives you that dopamine hit and the purpose to play the game. Weirdly addictive.

### 2/5 — Bugs

*2026-08-19, version 2.2.2*

I’ve played this game for many years and have gotten so many people to play. It’s been a game I can always come back to, but not recently.
It’s so frustrating when all I see are bugs in the game.

1) I will see characters outside of the map moving around.

2) I will teleport to other players when I’m not done looting my supplies.

3) The game will randomly close out and I lose all the XP that I earned.

I’m tired of it all. I can literally play a game of apocalypse and lose everything from one close out.
Even worse I could play Last Player Alive and it will glitch out so I lose the game.

I know it’s an older game, but if it’s still being played my many players then there is attention being given to it.
Developers fix this! I don’t download this game so I can lose all the time.
I would give this a 1 star rating had this not been a classic game and gives much nostalgia.

### 5/5 — Please do not kill the game

*2026-08-13, version 2.2.2*

I really do love the game and I think it is the best thing in the App Store, plus it is a free game which an absolute blessing

### 2/5 — Awesome

*2026-08-13, version 2.2.2*

Great Backbone game.!!

### 5/5 — I do like this game, but I don’t have that many weapons in the game. I wish you guys can give like a

*2026-08-10, version 2.2.2*

I wish you guys can give us like a free flame door whenever we’re playing like by ourselves cause that’s what I’m mostly doing

### 1/5 — Sas 4

*2026-08-08, version 2.2.2*

I’ve played every sas game on the school computer my tablet and even my moms phone and now that I have my own phone I really love this game and it’s a great game even as a predecessor to sas 3 which makes me happy

### 5/5 — What a game

*2026-08-05, version 2.2.2*

Never gets old

### 4/5 — More Maps and Zombies!

*2026-08-02, version 2.2.2*

Great game but something is missing to make it perfect and I don’t know what it is. Maybe you can add more guns and gear, just an idea 🤪

### 5/5 — Top 10 underrated mobile games

*2026-08-01, version 2.2.2*

This game is hella dope would’ve been way better if it was added to Xbox like war robots would be on everyday if they added it on there

### 3/5 — BUG

*2026-07-29, version 2.2.2*

Hola, Primero que nada el juego está súper bueno lo único porque lo que le doy 3 estrellas es el BUG de los servidores en nightmare ejemplo como en vaccine si no es que te buguea fuera del tren es en la nave que todos ya estando en ella la nave no despega ya e perdido muchos cofre lvl 8 o negras por lo mismo, entiendo que el juego ya lleva tiempo en la AppStore pero se necesita ese arreglo. Éxito

## Frequently asked questions about SAS

### What is SAS: Zombie Assault 4?

SAS: Zombie Assault 4 is an intense zombie shooter game where players team up to fight hordes of the undead. It features upgradeable weapons, unique character skills, and cooperative multiplayer action across various maps.

### What are the key features of SAS: Zombie Assault 4?

Key features include a vast array of upgradeable guns and armor, distinct character classes with customizable skill trees, challenging levels with 17 unique zombie types, and robust 4-player cooperative multiplayer. Players can also find heaps of epic loot.

### Is SAS: Zombie Assault 4 free to play?

Yes, the game is free to download and play. However, it does offer in-app purchases, which can include items like strongboxes containing weapons and armor, and potentially other enhancements.

### What platforms is SAS: Zombie Assault 4 available on?

Based on the description, this is a mobile application. It is designed for play on mobile devices, offering intense action and cooperative gameplay on the go.

### How does the cooperative multiplayer work in SAS: Zombie Assault 4?

The 4-player co-op mode allows players to quickmatch with others of similar levels. Players coordinate their custom skills and weapons to form an effective team, utilizing abilities like auto-turrets and room-clearing powers to survive.

## Version history (last 5 releases)

### 2.2.2 — 2024-12-17

Minor bug fixes and improvements.

### 2.2 — 2024-10-08

During the transition to the United Systems Initiative, a new communication system has been built to bring news to citizens across the planets and systems under the USI banner. This update allows soldiers to receive up to the minute updates on latest events and bounties.

### 2.1 — 2024-08-30

Minor bug fixes and improvements

### 2.0.2 — 2023-12-14

Various minor fixes aimed at improving game stability

### 2.0.1 — 2022-10-03

*Minor bug fixes

Time to hit the road! An all new level is waiting on the planet of Montano. 
Jump into the driver’s seat of one of the brand new cars and battle through the abandoned streets fighting hordes of zombies and the new gun-toting Scavenger enemies. Race to retrieve a mysterious artefact from space. Let's roll out!

## Apps similar to SAS

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Left to Survive: Zombie Games](https://appshunter.io/ios/app/left-to-survive-zombie-games/id1090501422) | 4.6 (56,919) | Free | Games |
| [DEAD TRIGGER 2: Zombie Games](https://appshunter.io/ios/app/dead-trigger-2-zombie-games/id720063540) | 4.7 (111,474) | Free | Games |
| [State of Survival: Zombie War](https://appshunter.io/ios/app/state-of-survival-zombie-war/id1452474937) | 4.6 (381,637) | Free | Games |
| [UNKILLED - Zombie Online FPS](https://appshunter.io/ios/app/unkilled-zombie-online-fps/id969488951) | 4.7 (29,410) | Free | Games |
| [DEAD TARGET: FPS Zombie Games](https://appshunter.io/ios/app/dead-target-fps-zombie-games/id901793885) | 4.7 (50,340) | Free | Games |
| [Zombie Frontier 4: Sniper War](https://appshunter.io/ios/app/zombie-frontier-4-sniper-war/id1469492048) | 4.8 (18,362) | Free | Games |

## More apps by Ninja Kiwi

- [Bloons TD](https://appshunter.io/ios/app/bloons-td/id331271904)
- [Bloons Super Monkey](https://appshunter.io/ios/app/bloons-super-monkey/id386241770)
- [Power Pool](https://appshunter.io/ios/app/power-pool/id392085544)
- [Zombie Trailer Park](https://appshunter.io/ios/app/zombie-trailer-park/id398941864)
- [Bloons TD 4](https://appshunter.io/ios/app/bloons-td-4/id404553553)
- [Bloons TD 4 HD](https://appshunter.io/ios/app/bloons-td-4-hd/id426415634)

All apps by Ninja Kiwi: https://appshunter.io/developer/386241773

## Related topics

[coop zombies](https://appshunter.io/ios/topics/coop-zombies) · [sas 4](https://appshunter.io/ios/topics/sas-4) · [sas zombie assault](https://appshunter.io/ios/topics/sas-zombie-assault) · [S.A.S](https://appshunter.io/ios/topics/s-a-s) · [s4s](https://appshunter.io/ios/topics/s4s) · [sas 3](https://appshunter.io/ios/topics/sas-3) · [top down shooter](https://appshunter.io/ios/topics/top-down-shooter) · [zombie survival multiplayer](https://appshunter.io/ios/topics/zombie-survival-multiplayer) · [zombie multiplayer game](https://appshunter.io/ios/topics/zombie-multiplayer-game) · [swat vs zombies](https://appshunter.io/ios/topics/swat-vs-zombies) · [call of mini zombies](https://appshunter.io/ios/topics/call-of-mini-zombies) · [online zombie games](https://appshunter.io/ios/topics/online-zombie-games) · [zombie combat](https://appshunter.io/ios/topics/zombie-combat) · [top down](https://appshunter.io/ios/topics/top-down) · [mini zombies](https://appshunter.io/ios/topics/mini-zombies) · [they are coming zombie defense](https://appshunter.io/ios/topics/they-are-coming-zombie-defense) · [sass](https://appshunter.io/ios/topics/sass) · [Online zombie](https://appshunter.io/ios/topics/online-zombie) · [samurai vs zombies defense](https://appshunter.io/ios/topics/samurai-vs-zombies-defense) · [call of mini](https://appshunter.io/ios/topics/call-of-mini)

---

*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-27.*