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.
User reviews: Mostly Positive (8,880 reviews)
Release Date: Oct 25, 2013

Sign in to add this item to your wishlist, follow it, or mark it as not interested

Buy Contagion

Buy Contagion 4 Pack

Includes four copies of Contagion - Send the extra copies to your friends!


Recommended By Curators

"It feels more like a first-person multiplayer Resident Evil 2 than Left 4 Dead."
Read the full review here.

Recent updates View all (193)

June 16

Contagion - 75% Off Steam Summer Flash Sale

For all those who were hoping to see our 75% discount Steam has put Contagion up for today's 12 hour Flash Sale so grab it at 75% Off and enjoy the recently released Free DLC Content!

Contagion is currently available at $4.99 or buy the 4-Pack at $14.99

For more information regarding the DLC mentioned above check out a recent announcement-




Hope you're all enjoying your summer thus far and are looking forward to new content on it's way!

-The Contagion Team

12 comments Read more

June 14

Contagion - DLC Maps now up and running on Official Servers!

If you missed the original announcement check it out here-

Just posting this announcement to let you all know that we've sorted out the issues with the Official Servers so you can enjoy dedicated servers to




This is but the first part of our DLC Bundle which we explained we were releasing in parts so that you can get your hands on the new content sooner rather than later. The new weapons and characters have run into sound related issues and we didn't think that excused further delays on work we could release. Flatline is nearly ready to make it's debut and you will be seeing CF_UnionStation as well as CF_CampWhitner as soon as it is ready.

Please refer to our DLC related discussion on future updates -HERE-

Troubleshooting Issues

There are some known bugs with all the new content being released but if you are having issues playing the game please post the following in the troubleshooting discussion so we do not miss it in a comment here-

  • Description of issue
  • Operating System
  • System Specs
  • If regarding a peripheral please include hardware
  • Don't forget to check our pinned Troubleshooting Threads that cover most issues.

Any sightings of bugs (not the roach haha) please post details and links to images in our Bug Reporting discussion here-

We wish to again thank everyone for their support and patience and look forward to pushing out updates like we did in the past which was fairly regularly.

-The Contagion Team

7 comments Read more

About This Game

What they're saying about Contagion

"Contagion aims to save the zombie game genre from itself" -GamesBeat
"Contagion does have a small role to play in the great gaming zombie apocalypse. I quite like it." -RockPaperShotgun
"Contagion is a gory, addictive horror game that’s well worth its $20 price tag" -Bloody-Disgusting
"Contagion presents a tense survival based horror game" -Canadian Online Gamers
"Barlowe Square is one of the best levels featured in a multiplayer game" -Hooked Gamers

Dynamic Gameplay

- Each play through is never the same with our built-in randomization system that changes the game/round each time you play!

State Of The Art Gore

- Our advanced gibbing system will immerse you into the game with limbs and organs being blown or hacked off!

Immersive Sound Effects

- Realistic ambient and sound effects that instantly draw you into the games dark apocalyptic atmosphere!

Traditional Zombies

- Slow moving undead that can only be truly laid to rest with a bullet to the brain or enough wasted lead in their body wasting away the ability to function.

Extensive Survival Equipment

- Over 28 vital pieces of equipment from a large selection of firearms, melee weapons, don't forget explosives, support items, tools, and much more to be added!

Unique Game Modes

- Choose from a multitude of classic and new game-modes that require co-op and survival skills in which you escape, extract civilians or hunt each other! Not to mention our Panic modes, upcoming Flatline (Survival) mode and more!

Stop paying more

- We will be releasing new content and 2 DLC Bundles in 2014... For Free! This was decided in 2010. Once you own Contagion you will never have to pay for updates or DLC bundles we develop for it... Ever.

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
211 of 286 people (74%) found this review helpful
6 people found this review funny
42.0 hrs on record
Posted: May 7
A clunky zombie survival horror game with extremely delayed patches and DLC that had been promised, with numerous developers leaving the company and with a manchild developer falsely banning people from the games steam forums for expressing discontent with the games current state and the development cycle. As for the game, it is dated visually, has extremely bad movement controls, has really bad gunplay, and allows for easily exploitable maps in which most people just camp in one spot. Also, the player counts at peak times are abysmally low (lower than 50 sometimes) Avoid like the plague.
Was this review helpful? Yes No Funny
A developer has responded on May 7 @ 10:32am
(view response)
908 of 1,342 people (68%) found this review helpful
2 people found this review funny
8.4 hrs on record
Posted: May 4
Hello all,

If you are unsure about purchasing this game, I sincerely urge you to please continue & read on.

The below review is my opinion of the game based on my perception of what I have seen over the course of many months. It is a sensible and honest review that I hope will give clear awareness to those who are thinking about purchasing it. This is neither a rant nor a fictitious piece of writing.

Firstly, it is with utmost importance that I emphasize this review may get reported by the developer named Tatsur0 who is the owner of Monochrome & Contagion. If you post an opinion which you are clearly allowed to do, so long as you are within regulations, he will flag down your post if he feels he does not like it. In laymen terms, if you have an opinion he will class your review as a false statement that therefore breaks rules. Please know that this is not a lie intended to jeopardize the developer[s] credentials. This is only a constructive warning. Please read all negative reviews of this game and you will find the developers response to be extremely concerning.

Unfortunately since an announcement which stated a lot of the developers left the company the game lost its momentum instantly & became pretty much redundant. No longer were there frequent updates or adding free content as was promised to those who spent money and backed Contagion on Kickstarter. No longer was there professional transparency as to why there was delays but instead fingers were pointed as if this industry is mere child’s-play. This is what brings me on to the reason why I and many friends will no longer play or support this game after doing so for so long.

How many people play this game?

Please go to and search for Contagion.

Currently there are “36 playing 23 min ago”

In all fairness, if you join an empty server players do start to fill it up but this is not guaranteed. There is not a huge amount of people who play this game. The developers rely on the promised free DLC to get the numbers back up but they will consistently tell none-buyers the game will pick up again after the DLC is released. This is for you to believe as we have been waiting months and months for the DLC. So based on the delay of the DLC, expect a long delay in player increase.


This is a word not to use lightly. It is so important that within any type of business you have a moral of professionalism that is the cover of your products reputation. This is not the case with Contagion. Tatsur0 [using him as he mainly replies to all of the negativism] cannot take any constructive criticism or hard-opinions about Contagion in any remote way whatsoever. Many other reviews also state this. It is up to you to do your research through the forum & through the reviews and make up your own mind as to whether or not you agree with this. I must add though, anyone with a clear and sensible mind will learn and see how Tatsur0 responds to his customers. He does it in a way which is condescending and extremely rude. He will treat you as if you are the one who is wrong and you are the one who is stupid. Please look closely at this. Professionalism? I’m afraid not.

Personal life mixed with work:

This should be an obvious one. When it comes to your real-life-work, you do not post your life story to all of your customers as excuses. This is just not professional at all. To show you in more detail what I mean, please continue to read on.

Below are official quotes from the Contagion forum, Facebook and so on.

1 - Alright, I'm off to eat dinner with my family, sleep, and head back home to the States after 13 years in Kyoto, Japan”

2 - “Also as for the quick update. I got home a little late due to traffic”

3 – “I as well had to use an alarm and have the wife call when that failed haha. But things are going very well.“

4 – “It's been 13 years since I've stepped away from my PC and not worked but my mom came out for surgery all the way on the other coast and I will be seeing my nieces and nephew this weekend.”

5 – “Sorry guys, Alex flew in this week to sort out Corporate accounts while also meeting up with our CPA. Due to this I've been in and out of conversations with our tax attorney and grabbing the necessary info overseas”

6 – “Due to the loss of a close family member may he rest in peace I would again like to apologize for further delays as I spent Friday with family.”

7 – “It's nearly Thanksgiving for many and even if you're not celebrating (in my case my family is still in Japan until immigration gives the go ahead)”

8 – “Even with me flying back home to the States to save the Company additional expenses and get me on a timezone”

9 - Wish me a safe flight(s) and remember just cause I may not be around

10 – “Alex Wright (Monochrome LLC, COO & Lead Animator) just has his first born "Colby Wright" and is at the hospital with his wife”

When others also noticed this and mentioned that is was utterly unprofessional, the CEO of an Incorporated Company named Monochrome, Brian "Tatsur0" Comer replied on the forum which is quoted below:

"I will speak freely about my personal life and don't care how individuals feel about it as I promised to be transparent about delays and other inconveniences. I don't want anyone's sympathy but do not care for those who feel I'm making up excuses (sorry but I can find less morbid excuses to make up). Deal with it."

He just does not care and that is from his own mouth.

However, these are only little amounts of quotes that are public for anyone to view for themselves. Can anyone else fathom why this amount of personal detail is brought into the update of the game itself? Some may appreciate this and I get that but there should still be a limit to how often you post such things? Look how much he clearly talks about himself rather than talking about the game or the FREE DLC. Has anyone wondered how or why he can talk in such intricate detail about his personal life with great transparency yet he cannot talk like this regarding the free DLC or future updates, animations and so on. This type of behaviour worries me especially when we are the ones who give such people our money.

I had to talk about this because I believe it is bad for your business to post to your customers that you are stuck in traffic, that you are going to eat dinner with your family, that you are going to sort out company taxes when instead you could of talked to us about why the animations have taken years to be added into the game and so on.

Free DLC Status:

For those who have been able to stick around long enough you will have heard about the notorious free DLC that was promised over and over again. Now I just want to make a point that I hope some will appreciate. You can always throw in my face; well they are giving away free DLC! Yes, this is true, but at the same time look how long we have been waiting for this free DLC. Just because something is free does not mean you can show the dog a bone and tease him with it every day and expect the dog not to get a little mad or upset. This is the case with Contagion.



It runs on an optimized version of the Source Engine
Very detailed/realistic environments
PvP mode “Hunted” is very tense
Traditional slow moving zombies
Great sound detail


Delayed DLC, animations & updates that were promised but are still yet to be completed
The lighting on most maps is too dark, making it hard to even see
Many bugs/glitches take a very long time to be fixed or improved
Objectives are extremely hard to understand/find
Extremely unprofessional & very rude developers
The animation quality is very, very poor
Movement is terribly clunky

Thank you for reading this review
Was this review helpful? Yes No Funny
A developer has responded on May 5 @ 3:21am
(view response)
234 of 329 people (71%) found this review helpful
1 person found this review funny
27.4 hrs on record
Posted: May 3
Originally I gave this game a positive review because of it's potential and it's survival horror elements/gameplay. My friends and I had a lot of fun playing this game even with the limited number of maps/overall content.

However, I'm changing my review due to the communication between the developer and its community. The developer for this game cannot take constructive criticism. How these guys deal with this is awful. I'm not upset about the wait for the new content. I understand it's free which is great. I am upset that they deal with their customers so poorly.

Pass on this game.
Was this review helpful? Yes No Funny
A developer has responded on May 3 @ 9:45pm
(view response)
67 of 86 people (78%) found this review helpful
1 person found this review funny
2.7 hrs on record
Posted: March 30
Honestly it was real fun. I loved it. Mostly because I thought there would be more content. Instead they randomly just said eh its finished. Left all the bugs too. So yah spend 20 dollars to play like 5 maybe 6 maps on a few different playlists. You'll get bored. The only updates on the news is about them going to game events like they are a big game industry. This game gets a 5/10 in my view.
Was this review helpful? Yes No Funny
103 of 157 people (66%) found this review helpful
2 people found this review funny
3.4 hrs on record
Posted: February 21
Contagion is an action FPS involving everyone's favourite fictional creature, the zombie. Your aim in every match is to survive as long as possible and in some matches survive long enough to get an evac and if you're unlucky enough to be killed by the zombie horde you become one of them with the goal of killing the survivors. With ammo and weapons being very hard to come by how you use your ammo is of upmost importance.

+Nice graphics
+You get to play as survivors and zombies
+There are quite a few characters, each with their own backstory
+Quite a few different weapons, ranged and melee
+You can board up windows and doors to slow down advancing zombies
+Good soundtrack
+Headshots are one hit kill apart from on riot zombies, headshots are very satisfying
+You can play singleplayer or mutliplayer
+Workshop support

-Gets repetitive quickly and with no progression system it has very little replay value
-Hardly any players online
-Zombies don't look great, they're basically just grey humans covered in blood
-Some of the maps are very confusing
-Some maps don't have melee weapons so you're screwed if you run out of ammo


It's a fun zombie game but with little replayability this game is only worth getting if you're playing with friends and you get it on sale.

El K.
Was this review helpful? Yes No Funny