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SAS: Zombie Assault 4
Purge the undead! Intense action-shooter with deep rpg elements, including upgradeable guns and armor, unique class skills, and class special abilities. Entire game can be played single player or as a 4-player online co-op game, including PvP events like Last Man Standing.
What players say
Steam review score and the most-helpful voices, which may include critical ones. Score via Steam as of 2026-09-02 · quoted reviews as of 2026-05-12.
What reviewers agree on
72 of the 102 reviews raise this.
“I have been playing the series since the flash games.. i remember getting in trouble loading up my sas 3 account in computer class lol. this is a mobile port, still just as addictive as the last. this is the first time…”
“This is a decent port of a flash game that improved massively on the networking but removed a level or two in the process. It has the bones of an amazing game but while fun in the moment, the lack of variety in levels…”
17 of the 102 reviews raise this.
“This is a decent port of a flash game that improved massively on the networking but removed a level or two in the process. It has the bones of an amazing game but while fun in the moment, the lack of variety in levels…”
“A classic zombie game you can get into, you can almost play it on anything ipad, phone, computer, ipod, probably even the first computer ever made 10/10. There is also multiplayer up to 4 people to play with and its…”
“arcade feel with responsive play and upgradeable gear and skills. love the co-op”
6 of the 102 reviews raise this.
“Loved playing this thing as a kid, but playing it again now feels like its very repetitive and just like a experience where you play a level be like oh okay, that was something then you play another level and its the…”
“A classic zombie game you can get into, you can almost play it on anything ipad, phone, computer, ipod, probably even the first computer ever made 10/10. There is also multiplayer up to 4 people to play with and its…”
“very cool 2d shooter good to kill some time”
4 of the 102 reviews raise this.
“Great top-down shooter. More interactive features and fleshed out story than SAS:ZA3, with the option to buy premium gear (though not required, I haven't spent a dime on this game and am still making it through just…”
“Has so much unused potential for a lot of stuff , great game overall for grinding category .”
“arcade feel with responsive play and upgradeable gear and skills. love the co-op”
4 of the 102 reviews raise this.
“i played this once it came out back in 2017 i think and had so much fun playing. i had to come back and play again”
“A classic zombie game you can get into, you can almost play it on anything ipad, phone, computer, ipod, probably even the first computer ever made 10/10. There is also multiplayer up to 4 people to play with and its…”
“A true classic, always fun to come back to”
12 of the 102 reviews raise this · 4 of them still recommend the game.
“This is a decent port of a flash game that improved massively on the networking but removed a level or two in the process. It has the bones of an amazing game but while fun in the moment, the lack of variety in levels…”
“This is a foul game riddled with monetization and data mining. I wouldn't recommend this to anyone and frankly if someone recommended this to me it would be a strike against their opinions as someone who enjoys…”
“Loved playing this thing as a kid, but playing it again now feels like its very repetitive and just like a experience where you play a level be like oh okay, that was something then you play another level and its the…”
9 of the 102 reviews raise this · 5 of them still recommend the game.
“This game sucks i was at level 100 with a black shock field 12/4 and black stripper 10/3 and a full set of black gears, keys and cores. after years of grinding , logged in today and the game rolled me back to level 97…”
“This sucks, i literally had played this game for 2 yrs and got to lvl 90 but for some reason my entire progress got deleted.”
“Decent little game but bugs cost resources and sapped any interest I have in playing. Wasted 1,000 ammo on a mission where crates just wouldn't move and have no desire to continue playing.”
6 of the 102 reviews raise this · 1 of them still recommend the game.
“This is a foul game riddled with monetization and data mining. I wouldn't recommend this to anyone and frankly if someone recommended this to me it would be a strike against their opinions as someone who enjoys…”
5 of the 102 reviews raise this · 2 of them still recommend the game.
“This is a decent port of a flash game that improved massively on the networking but removed a level or two in the process. It has the bones of an amazing game but while fun in the moment, the lack of variety in levels…”
“Don't have old classic map: Meltdown !!!”
5 of the 102 reviews raise this · 4 of them still recommend the game.
“I AM GOD, BOW DOWN! WELCOME TO THE MF GRIND!”
“SAS:ZA4 is an entertaining coop shooter, but it is a time-consuming game as well. In my opinion there are better F2P options out there, but it's free so try it by yourself.”
“its fun, crashes all the time. nightmare? crashes, you lose a ticket and all your progress from that match. you in a 30min+ long MOTD? crashes and you gain nothing.”
Counted across 102 English reviews, sampled to match this game's 85.9% positive rating · as of 2026-05-12
“Enjoyed the previous games back in the browser days. This is solid fun and would enjoy it more if you have a few mates to play with.”
— a player, Steam review · 1 hrs played“Man, this game is still epci after many years later.....”
— a player, Steam review · 44 hrs played“although the demo for the fifth game is coming out soon, the fourth SAS Zombie assault game is one of the most iconic game in the series. Highly recomend as the game is very fun and can be addicting to some players”
— a player, Steam review · 8 hrs playedPlayer activity
Monthly average concurrent players. Live data self-collected from the Steam API · history through 2026-06 via SteamCharts.
Achievement stats
Global completion rates across all Steam players — a data view of how far people actually get. Source: Steam official stats · as of 2026-09-05.
Price tracking
US-region pricing (USD), sampled twice daily by our own tracker since 2026-07-11. Steam prices vary by region — always confirm your local price on Steam.
Latest official news
Developer announcements via the Steam news API — links go to the original posts. More across all games on the news hub.
Zombie Assault: Resurgence - Demo Live Now!
The Zombie Assault: Resurgence demo is live now as part of Steam Next Fest! This demo is designed to showcase the core gameplay loop, progression systems, and co-op experience at the heart of Zombie A
Zombie Assault: Resurgence - Dev Diary #13 - Steam Next Fest!
Ten-Hut, Mercs!It’s the first dev diary of the year, and it’s a good one! We’re incredibly excited to share that a demo version of Zombie Assault: Resurgence will be participating in Steam’s Next Fest
[ SAS INTERNAL COMMUNICATIONS - SECURE ] >>
We’ve been going through the old files on Kurios station, and we’ve found references to a weapons cache the old Government had hidden away in case of emergency. How a zombie outbreak across the system
[ SAS EMERGENCY TRANSMISSION - SAON ]
\Requesting immediate support! Some sort of rift has opened up here on Saon and what can only be described as a giant monster has stepped out of it! It’s massive and is just shrugging off any attacks
Despite the setbacks, our mission is unchanged.
\ >> Thank you for your assistance in our research. Your help is greatly appreciated and the compensation we have provided doesn't begin to match the sacrifice you and your fellow agents have made for
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Screenshots
Official Steam store screenshots — click any shot to enlarge.
Facts & details
From the Steam store record, snapshot 2026-05-12.
| Genres | Action, RPG, Free To Play |
| Player tags | Free to Play · Zombies · Multiplayer · Top-Down Shooter · Action · Co-op · Shooter · Top-Down · 2D · RPG · Survival · Singleplayer (SteamSpy community voting) |
| Features | Single-player · Multi-player · PvP · Online PvP · Co-op · Online Co-op · Cross-Platform Multiplayer · Steam Achievements |
| Languages | English |
| Controller | Full support |
| Achievements | 64 |
| Official site | http://ninjakiwi.com |
Minimum system requirements (PC)
Minimum: OS *: Windows 7 (32 & 64bit) Processor: 2GHz or better Memory: 1024 MB RAM Graphics: OpenGL 2.0 compatible, ATI, Nvidia or Intel HD Storage: 512 MB available space Sound Card: Windows compatible sound card