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Contagion isn't your average Zombie Shooter but instead takes a more realistic and different approach to the popular genre with unique characters, environments, weapons, items, and a built in system that makes every round completely unpredictable with resources, objectives, and paths ever changing.
Release Date: Oct 25, 2013
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Contagion Update - Hotfix 2014-04-15

April 14th, 2014

With the Full Release of Contagion things have been hectic but we've been listening while focusing on our work and today a number of fixes were put out to resolve issues we caught in passing. We will of course be keeping our eyes and ears open as we push out a patch that includes the Contagion SDK later this week on Sunday! Here is the changelog that went out today-

Contagion - Hotfix 2014-04-15
  • Fixed sound memory allocation error causing Runtime error for some users.
  • Fixed Invite To Game and Join Game elements through Steam.
  • Added Hostname and Password settings on the Advanced Server Settings.
  • Added the ability to disable hearing character voices to the multiplayer menu.
  • Optimised sounds in the game to improve sound loading times.
  • Disabled certian difficulty commands that could be used to cheat to get Achievements.
  • Fixed ingame options menu showing up behind the ingame main menu.
  • Fixed strange blue colour on survivors' eyes.
  • Fixed AI survivors climbing into the air.

Remember these fixes may still be updating on our servers so if you receive a **** differs error it just means the server is not yet updated.

Don't forget we're still holding our

Contagion - Let's Play Competition with prizes exceeding $12,500 USD

For information visit- http://www.contagion-game.com/lets-play/

and/or watch our instructional video

For those that missed it Contagion has been Fully Released having held back on some major changes. Be sure to check it out and if you like what you see...

We look forward to seeing what the modding community we love so much brings to Contagion!

-The Contagion Team

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Contagion - Major optimization and more with today's hotfix!

April 14th, 2014

We had our Full Release on Friday and are still waiting for Valve to fix the listing issue. But with full release we ran into issues that weren't present through testing and many users with low end rigs and those who use to play even below supported min system requirements were dealing with crashes.

We released a hotfix with major optimization tweaks that should have resolved all/most of those issues. We will continue to optimize and improve the quality of the latest content (yes including characters which is already being worked on) and some features that are acting up (voice volume). We did more than that with todays update so below is the changelog-

Contagion :: 2014-04-13 Update/Hotfix
  • Heavily optimised game resources by almost half when settings are lowered
  • Fixed players standing on ladders stopping zombies from climbing up
  • Fixed and added back IED weapon
  • Fixed zombie spawns on Barlowe servers causing MAX EDICTS crash
  • Removed lots of unnecessary resources from the game
  • Disabled tossing objective items out of the loading bay
  • Fixed getting stuck in the overturned train in Pioneer
  • Added security cameras to Barlowe escape
  • Fixed cameras in RPD to show correctly for all players
  • Fixed lighting in Subway on Barlowe Escape
  • Fixed Singleplayer/LAN servers having default passwords
  • Fixed AI zombies getting stuck in RPD vent
  • Fixed AI zombies standing up and getting stuck when in areas that require crouching
  • Game now reads the update text on a second thread to remove the delay that sometimes occurs.
  • Fixed dropped weapons colliding with invisible barricade positions
  • Adjusted loading-screen to recieve additional messages to help keep up with changing levels
  • AI survivors now have the ability to climb ladders, small props and fences instead of getting stuck
  • AI survivors also now have the ability to get un-stuck much easier and build better paths to follow survivors
  • Fixed being able to spawn outside the map on Barlowe
  • Many navmesh fixes for various maps
  • Fixed indoor rain FX on Barlowe

We are listening and will continue to improve, add, and optimize. Yes we're also working on the SDK for a release here very soon, also working on Linux and Mac and hope to announce their release dates shortly.

-The Contagion Team

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About the Game


Contagion takes place in a fictional world where the original Roanoke Colony thrived up until now. A contagion of unknown origins has infected the locals turning them into a mindless horde of flesh eating zombies. It is up to the remaining survivors to escape, extract, or hunt one another if they are to survive the horrors they now face. Contagion isn't your average Zombie Shooter but instead takes a more realistic and different approach to the popular genre with unique characters, environments, weapons, items, and a built in system that makes every round completely unpredictable with resources, objectives, and paths ever changing.


Play alone, via lan, or online with family, friends, or other members of the community. You start out as a survivor of an unknown contagion that has turned your world upside down forcing you to scavenge for limited resources where each time you play you must seek weapons, ammo, items at a new location, where the undead may or may not be where they were before in fewer or greater numbers, and even the paths you once took may now be blocked forcing you to find another way to complete your goal. A steady hand, managing what little ammo you've found, and using your head are required to complete your goals or you'll find yourself part of the flesh eating horde yourself. Every time you play you'll find things have changed sometimes quite drastically making each play-through new for both new players and veterans alike.


With 3 unique game-modes that suggest or insist on co-op to follow a set of randomly generated objectives to escape, or secure a location and extract innocent survivors where the paths and spawns have changed promoting exploration and the need to watch each others back. Of course not everyone is a team player and while having to deal with the same obstacles as before the lack of trust and need for resources in our Hunted game-mode turns survivor against survivor while avoiding the infected... or not.


With a GROWING arsenal of over 28 firearms, explosives, melee weapons, tools, and more. We won't stop there as we provide you with what you need to fend off, fight, or hunt your way to survival! But please keep in mind that you need to manage your inventory and an item once used may be useful later on. Plan ahead before discarding anything.


Contagion is built on a heavily modified version of the Source Engine that is constantly being optimized for low and high end rigs to best immerse yourself in-game. We've pushed the Engine as far as it can go while still enjoying high frame rates, lag compensation for those with high pings, over 500 Official Servers to choose from, a unique HUD/UI, and custom shaders (optional) that all give the game the AAA feel even without the AAA budget. Contagion is also one of the very few games where you get the chance to play as the undead which we've been doing now for over 10 years.


With ammo scarce every round counts so know your weapon! Don't waste time beating or firing on an already broken body. Sure they'll eventually go down, especially as you remove limbs and organs but returning to the true tradition of Zombie Survival you want to take out an infected's brain. Hitting an ear, nose, mouth, or other traditional "Headshot" related impact will hurt but not instantly put one down. You'll need to either sneak up and silently kill with your melee, or charge up a blow or swing and damage the brain (accurately placed) beyond repair.

If relying on a firearm knowing the effective range and accuracy of your weapon is extremely important as well as holding your ground and using your weapons scope or ironsights for maximum accuracy. A survivor crouched, with a high velocity rifle, using the weapons scope or ironsights is less likely to miss their intended target and penetrate the brain while another who's on the move and shooting from the hip will be frustrated to find out that our weapons aren't loaded with smart rounds that do all the work for you. Do be careful where you lob a grenade and take cover as you don't want to fall victim to your own weapons. If the horde before you is too large or you find you're lacking the ammo to defend yourself be sure to use the cover of local fauna or sprint out of sight of zombies so they lose your scent and hope they don't stumble into you or you into them.

Each game-mode also includes a set of features on your in-game smartphone that help you find and complete your next objective, a gps showing you a path to your next location as well as indicators of fellow teammates and AI survivors that require your help to barricade and hold the fort till extraction arrives, or use your bluetooth as you hunt down survivors for their gear as they appear on your phone if in close proximity even allowing you to ping their phone to give off their position but this is a double edged sword so be careful.


Whether you were left behind by your team, got overwhelmed by the horde, or hunted down for what little you had in your inventory, you're now one of the undead. Use your zombie senses to move through the dark easily, spot victims, fellow player zombies, or the unlucky infected survivor and track them. Take advantage of every opportunity and sneak up on survivors grappling them and sinking your teeth deep into their throats allowing other zombies to attack and potentially infect them, that is of course if you're not interrupted by other survivors.

Use your roar ability to call zombies close to you and create your horde to quickly break through doors and barricades, assault survivors as AI attacks also have the potential of infecting players who will either die at the hands of the undead or given time turn from the infection and joint he ranks unless they manage to reach the end and are rescued. You can also direct attacks or using your blend feature let the AI take over your character making it harder for survivors to pick you out of the horde or shambling zombies with the hope that this will let their guard down giving you a significant advantage. Unlike survivors you can also scale fences and other obstacles since you have your hands free making it easier to navigate your way to your target(s).


While the undead outnumber the living, player zombies do need to be careful not to charge head first into a sledgehammer or bullet as you can return as a semi intelligent player controlled zombie for only so long before forced into our unique spectate mode. As a spectator you can traverse the map as easily as a survivor and/or zombie but beyond creeping out players as disgusting, fluttering cockroach you're nothing more than a spectator that can be crushed, smashed, shot, or blown apart only to return as another roach waiting to see the outcome of the game. Apparently cockroaches can survive whatever apocalypse is thrown at them.


The Founder of Zombie Panic Source is the Founder and Lead Designer of Contagion which for those familiar with ZPS know means we put our community before sales and know a strong bond with our community is what makes a game truly successful. Not only are we releasing Free DLC bundles later in the year but will be releasing the Contagion SDK for our modders, new maps, weapons, features, and more as we prototype ideas both born from the team and the community. We'd like to go another 5+ years pleasantly surprising the community like we've done in the past. Some other things you should keep an eye out for is our Linux & Mac Releases, Oculus Rift Support, Already have 360, Steam Pad, and other game-pad support but always seeking out to ways to better immerse players by supporting what matters to you!


"Contagion aims to save the zombie game genre from itself" -GamesBeat

System Requirements

    • OS: Windows® 7 32/64-bit / Vista 32/64 / XP 32/64
    • Processor: 2.4 GHz Intel Dual Core Processor
    • Memory: 4 GB RAM
    • Graphics: DirectX® 9 compatible video card with 256 MB, Shader model 2.0. ATI X800, NVidia 6600 or better
    • DirectX®: 9.0c
    • Hard Drive: 7 GB HDD Space
    • Sound: DirectX 9.0c Compatible
    • Hardware: Mouse & Keyboard
    • Other Requirements: Broadband Internet Connection
    • OS: Windows® 7 64-bit / Vista 64-bit / XP 32/64
    • Processor: 2.4 GHz Intel Dual Core Processor
    • Memory: 8 GB RAM
    • Graphics: DirectX® 9 compatible video card with 512 MB, Shader model 3.0. ATI X1600, NVidia 7600 or better
    • DirectX®: 9.0c
    • Hard Drive: 7 GB HDD Space
    • Sound: DirectX 9.0c Compatible
    • Hardware: Mouse & Keyboard
    • Other Requirements: Broadband Internet Connection
Helpful customer reviews
496 of 586 people (85%) found this review helpful
135 products in account
10 reviews
12.7 hrs on record
While the over saturation of Zombie related shooters in the gaming arena is staggering, I found Contagion to be somewhat of a refreshing experience. Available through Steam Early Access, and still in its beta stages, Cotagion is well worth the small amount it is asking for. A slow burn when compared to other FPS Zombie games, Contagion requires you to choose your next step carefully while conserving every bullet. Even though not completely finished, Contagion is off to a great start.
Posted: November 25th, 2013
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323 of 425 people (76%) found this review helpful
165 products in account
7 reviews
11.7 hrs on record
At the time of writing this (11/2/2013 ), Contagion is still currently in beta form.

With that being said....Contagion already outperforms most triple A title retail releases. With it's addictive game modes, dead on gameplay and rock solid servers, Contagion is already putting some life back into the into the online co-op survival horror genre laid out by classics such as Left4Dead and the Killing Floor.

Running on an optimized Source engine Contagion's graphics are sharp, smooth and alive with death around every corner. From the lighting effects in the dark corridors to the reflection effects seen in mirrors, lakes and puddles the developers have created a world filled with atmosphere. Yet, the sound in Contagion is what will immediately draw you into it's world. Each echo, gunshot in the distance and glass under foot will immerse you into this adrenaline filled horror show. Each and every thing about Contagion screams instant classic!

I have never written a review while a game was still in Alpha or Beta form but, the developers created an experience that I can't get enough of and I wanted to put any questions to rest as to whether or not you should purchase this now while in Beta or after the final release.

Although I wouldn't consider this my final review, I will absolutely recommend Contagion to everyone here on the Steam platform.

If you've never been part of a Beta release and the excitement that goes along with being a part of a successful title in the making or if you always wanted to say you were there from the beginning before everyone else jumped on the bandwagon before it became a household name.....This is your opportunity!!!

I 100% recommend purchasing Contagion in Beta form or otherwise. I go as far to say you'd be crazy not to. Trust me as the title states this game is contagious!!!

Contagion Beta (V2990) review 9.2/10!!!
Buy this game!!!
Posted: November 2nd, 2013
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209 of 289 people (72%) found this review helpful
69 products in account
3 reviews
11.0 hrs on record
(This review was written during early access beta 11/25/13)
For an early access game, over all very good.
Pros: mazing unique gameplay and revolutionary game modes and maps. Amazing multiplayer with 8+ slots in servers, allows maximun co-op potential. Over all impressive game, I for one am very exited to see whats next in future updates such as: new guns, maps, and game modes. Which leads me to the cons section

Cons: First of all this game is not finished, so if you can't stand bugs every now and then, then wait for the full release. But this game does have its fair share of bugs such as slight graphics and model glitches. Nothing unbearable. This game currently only has 4 maps, a hand full of guns/weapons etc. so nothing major when it comes to variety at the moment. but like i have said before, this game is definitelly not finished and is updated regularly so there will be lots more maps and weapons.

My rating would be a 8.5. I would bump that up to a 9.2 when the bugs get patched and new maps and guns get added.

Over all review is that I would most definitelly buy this game if your looking for a fun co-op fps/zombie survival game to play with friends and can wait for updates and put up with bugs. Keep up the good work!
Posted: November 25th, 2013
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161 of 233 people (69%) found this review helpful
66 products in account
27 reviews
5.1 hrs on record
The game is on early access at the time of this review. So its just a list of good/bad points at this stage:
very well made maps, nice community, SDK on the way so there should be loads of community content. Different game modes, PvP, Co-Op etc. in-game sound is very impressive. Source engine and modest system requirements to run. Actually does run well on the minimum spec. The developers communicate well with the community.
Bad: Not much bad about it- limited variety of maps so far is the only thing that comes to mind.
Posted: November 26th, 2013
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53 of 63 people (84%) found this review helpful
261 products in account
1 review
35.1 hrs on record
Please note that this Early Access review is not a substitute for a comprehensive bug report.

Contagion is the zombie game purists have been waiting for since they first cracked open "The Zombie Survival Guide".

For me, that's about ten years. For ten years I've waded through a horde of zombie games. Nothing emulated the raw feeling of isolation and cold that a gunshot in the distance or a scream or absolute silence can bring. We're all familiar with Brooks' original canon for zombies. Only headshots kill them. Eat flesh until they can't. Only sensory organs that have not been decayed or destroyed work. A moan causes others to moan, and they are attracted to the sound like a foghorn in the night. I never felt like I would truly find the zombie game that emulated this canon so perfectly. First there was Dead Rising - a close contender - followed by Dead Space [which opened a whole new can of worms] and Dead Island, which underperformed in basically every aspect. Left 4 Dead left a hollow feeling, mowing down thousands of zombies in a few hours seemed not worthwhile. Even DayZ left a bitter taste with its focus on player interaction and intense PVP, zombies were a secondary addition to the game and in their state of bugginess and all-out failure to function were hardly a threat to be feared for all but the newest players.

Finally, though, finally. From the ashes of Zombie Panic! Source comes a developer prepared to emulate and yet transform the genre. Erasing waypoints with Google Maps on a cell phone and slaughtering the idea of overpowered zombies by balancing their frailty with disguise and scarce ammo, this game is reaching for the stars.

Contagion performs in ways I never thought I would see, genuinely. It strikes feelings of sudden and intense panic, a moan can send my heart pounding in my ears, praying it would be silent so I could hear which direction the zombie was coming from. A gunshot can bring hell's fury itself down on your head, while boarding up windows and doors can buy you time to escape. Zombies' interaction with the world largely seems to be directed by line of sight and various audio cues, which gives them a shambling and confused appearance. A slight trigger can send Zack coming at you, but a bullet in the wrong place can mean a bite, and a risk of infection. Incentivized by kill count and bragging rights, a human infected is unlikely to share this information with his teammates for fear of being shot on the spot. A group of humans prepared to fight off a horde of 50+ shambling corpses can easily be dissuaded by a misaligned headshot tearing off the jaw of a zombie and inspiring panic in the squad. A misplaced shotgun round can result in legless zombies crawling under the horde and into your lines. Brutality, free-for-all, and all out panic. All of it rings true of the first days of the Zombie apocalypse, and all of it brings a warm feeling of nostalgia to my heart, and hopeful eyes for the bright future where the Zombie genre isn't filled with crafting games, 8-bit indie ♥♥♥♥, and quick time events.

Even the zombie player gameplay has merits. A helpfully designed "camouflage" button allows an inept player to disguise himself as he views his zombie in the third person and have control assumed by the AI. Moaning loudly can draw a horde, and in turn the moans of those zombies draw more, which can be lead to the human's hideouts and used to swarm them. A biting function has a high chance to infect humans, and watching your former counterparts murder each other for fear of infection in their hideout is rewarding in its own regard.

I've never been so happy to realize a game was early access. After about 30-40 hours, I can easily see myself growing tired with this title and passing it into novelty, but it was well worth the 3$ spent. Call me nostalgia-blind, but there's so much potential content to see from these developers, and I'm very excited to be along for the ride.

18/10, buy this and buy it for all your friends. This game will make history, and if it doesn't, I'll eat my shoe on livestream.
Posted: January 5th, 2014
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