Available for Free

The basic idea of Zombie Panic! Source is to create a solid gameplay that is based on a classic zombie outbreak scenario. The living dead are coming for the last remaining humans, and these survivors must fight them off and live through the day.

The game works like this:

At the start of each round, players can either choose to join the human team or volunteer to be the first zombie. If no one volunteers the game will pick one human randomly, and the game begins! The starter zombie's goal is to kill the humans while the human goal is to stay alive as long as possible, complete objectives, or even wipe out all the zombies. The catch is that when a human dies he will simply join the ranks of the undead, now ready to finish off his old living teammates. The humans can't tell by the player list who is alive and who is undead.

Eventually, there will only be one survivor still standing if everything goes wrong, his back against the wall while facing the animated corpses of his former allies. In a survival round, the zombies team only has a certain number of reinforcements (lives), and when a zombie is killed they lose a life from the counter. However, when a human is killed they gain 1 life. When the zombies run out of lives, the remaining survivors win the round by killing off the remaining undead left on the map. In objective rounds, zombies get an unlimited number of lives while the humans must complete a variety of map-based objectives to win.

Human abilities and advantages:

  • Speed - A zombie can only run at about 80% of the top speed of a human player. Though, the more weaponry and ammo a human picks up, the more it will slow him down, making him an easy target for the undead. If they are carrying nothing, a human can easily outrun a zombie. Watch out so you don't get cornered...
  • Weapons - The humans have a wide selection of weapons to use for defending themselves, like firearms, explosives and melee weapons. It is essential for humans to locate weapons and ammo around the map in order to survive, since they only spawn with a random melee weapon and handgun scavenging is a must. Remember that inventory space is limited and hogging weapons will merely slow a survivor down, so sharing with teammates is a must!
  • Numbers - At the beginning of the round, there are only from 1-3 zombies, depending on how populated the server is. Everyone else is a survivor. This means that they can easily watch each other's backs and provide cover fire. However, once their ammo starts to run dry and they begin to squabble amongst themselves for the few precious clips of ammo available.
  • Communication - Instead of typing messages to each other (occupying busy hands), which can be really dangerous when the zombies are lurking in the shadows, the humans have the ability to communicate by voice commands. There is a menu with several commonly-used commands that can help the survivors to organize a defense, trade ammunition and request help.
  • Panic! - Drop everything but what is in your hand and flee! This grants a temporary speed boost, allowing for a quick getaway, but use it wisely. More often than not, panicking just staves off a survivor's inevitable doom.

Zombie abilities and advantages:

  • Regeneration - Over time, zombies regenerate hit points, making it more difficult for survivors to make the undead dead.
  • Carrier - The first Zombie of the round differ a lot from the other undead - he looks different, sounds different, and has abilities that the average zombie can only dream of. He is the Carrier! With the power to infect people (10% infection chance per hit by default), he will cause panic and paranoia amongst the living. He also has the ability to roar, summoning other zombies to his aid.
  • Persistence - Zombies might seem to die often, but they won't give up. They just keep re-spawning over and over until your pistol runs out of bullets, your back is to the wall, and there is no escape.
  • Numbers - Later on in the game, as the undead ranks swell with a fresh dead, the last few humans will find their superior weaponry of small comfort for the hordes of zombies closing in.
  • Zombie Vision - Zombies can't use flashlights, so they have the ability to use Zombie Vision. Z-vision works in a way that it brightens up any possible light source in a room to make it more viewable. More importantly, when humans get tired, they start to glow blood red, making it easier for a zombie to track their prey. To prevent games of hiding and seek a survivor who just sits still will also start to glow red through sheer terror of the unknown.

We want the game to feel creepy and give you a sense of desperation, and yet not take itself so seriously that you can't laugh at the way you just died. Overall, fun and playability is the priority, and while realism and horror are important, those things are just a bonus when possible. We want a game that you can easily play with groups of any size, even with small or uneven numbers. Plus, there's a certain sense of satisfaction in tearing apart those heartless survivors who failed to protect you while you were alive, limb from limb.


See you there!

-Zombie Panic! Team

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It's finally here! It has been a long road, with a lot of obstacles and trials. Our team could not have foreseen the enormous amount of work this update would be when we first set out to bring this game an update it truly deserves. But we kept going because all of you supported us - this update is a testimony to what a dedicated community such as ours can achieve!

Or check our Frequently Asked Questions thread for more information about the v3.0 update, or ask us any questions.

We'll need your help!

In our last announcement, we explained how many problems we ran into with code that was ported over from ZPS v2.4, and that it forced us to rewrite many sections of code in attempt to get things working properly. We had very little time to playtest these changes before release, and we even had to make last-minute fixes/changes - which means it's very likely that there will be bugs/issues that we weren't aware of.

There's two ways to report bugs or issues to us:

  1. Start a discussion on our Steam Community Hub's Discussion Boards under the Bug Reports & Issues sub-forum.
  2. Post a thread on our new official website's forums in the appropriate sub-forum under Bug Reports & Issues.

We've already received a ton of useful reports from all of you, and we've even been there in-game with you to witness some of these issues ourselves. Many of them have been fixed, and we're working on fixing even more of them. Thanks for all of your help, please keep the feedback coming!

SourceMod Banned due to Security Breach

Due to a high security breach regarding our gamebans, we've come to the decision that SourceMod will now be fully banned from being used in Zombie Panic! Source. This ban will likely be permanent, because users can perform extremely malicious actions with the aid of SourceMod, and this absolutely cannot be allowed to happen. If these issues with SourceMod ever get addressed, then perhaps we can revert the ban, until then this ban will be permanent.

This breach would allow users to spoof their own SteamIDs, completely bypassing our gamebans, as well as server bans. Besides being completely immoral, this is also against the Steam Subscriber Agreement (SSA), and Steam Online Conduct (SOC). Any users found to be doing this will be reported to Valve by us, and have their accounts completely banned.

If you encounter anyone abusing this cheat/exploit, please gather evidence (preferably video from in-game) proving that this occurred, as well as a link to their Steam Profile, and any other pics or links that might be necessary. E-mail them to us at "support@zombiepanicsource.com".

We've decided to postpone the implementation of this ban for 3 weeks in order to give you all time to program your plugins in AngelScript. You may currently be unable to do some of the things required for your plugins to work, but AngelScript is still very early in its implementation into ZPS. You can send us your requests and suggestions for new hooks for your plugins under the Ideas & Suggestions sub-forums on either our Steam Community Hub Discussion Boards, or our new official forums.

We're very sorry to have to punish all of you because of the actions of a few. But due to the amount of malicious things one could do with SourceMod, this was the only option we had to completely solve the problem. We hope that you all understand, we didn't want to do this, but because of Uncle Fred we've been forced to.

Addressing Abusive Behavior Within Our Community

With the v3.0 update will come the removal of several community members who have been proven extremely abusive and disruptive beyond forgivable measure. These members will have their accounts permanently banned from playing Zombie Panic! Source with this update (in a few weeks once we kill SourceMod). We'll also be prepared to take action regarding any similar situations that occur in the future, should it be necessary.

Most notably of these members is (SL) Uncle Fred, owner of the SL CABIN and SL COMMUNITY servers. He spoofed his and others Steam IDs to get them unbanned from the game (the reason we've had to ban SourceMod). He was also proven, through a large community investigation, to be the main culprit behind the ocean of server attacks that have hit servers all over the community over the past years. This was done by taking advantage of an exploit related to the server's RCON (Remote Control) port on the Source 2007 Engine.

An extraordinary amount of evidence was collected and brought to us to review. Our team agreed that it proved him guilty, thus we made the decision to permanently ban him from playing ZPS. We have also permanently banned other community members who were proven to be abusing this exploit too.

We understand that this is a controversial decision as it jeopardizes the future of the SL servers, where a lot of players go to play. That is why we invite you all to review and discuss the evidence that we can publicly share. Please be sure not to violate Steam Rules & Guidelines when posting - we may have been a bit lenient when these posts were made due to the situation, but we will be stricter this time. We don't want there to be any arguing, or rude/inappropriate posts made regarding this subject.

We also advise that you stay away from Uncle Fred, and his servers. Because by playing there you are inadvertently supporting his actions, and behavior - which have caused great harm to the community, and will certainly continue to do so. This is your community, and it is what you make it. We urge you all to protest against Uncle Fred and the SL servers for his malicious, unforgivable actions.

We want to thank every single one of you who have helped in bringing this behavior to justice. We specifically want to show our deep gratitude to Silence and Janaz Leonheart, of the now late Vertigo Gaming Community, for helping us understand and fix the exploit, as well as helping the community protect their servers against the attacks. We sincerely apologize for not acting on this matter sooner.


It's important to note that we've included a number of conditions that must be met in order for the achievements to be enabled. This is to prevent players from gaining an unfair advantage in earning them through custom content, such as maps or gameplay modifying plugins.

Since the achievements are designed around official content, we simply can't vouch for the balance being proper in custom maps, or on servers with modified gameplay. Therefore, the achievements can only be unlocked while playing on unmodified official maps (with unmodified map scripts).

We've created this thread to explain what those conditions are, and to answer any questions you may have about them.

Review Us!

After playing v3.0, tell us your opinion about the changes by reviewing Zombie Panic! Source!

Or share your opinion with us in a thread, either on our Steam Community Hub Discussion Boards, or on our new official forums. Ideas and suggestions can also be shared with us on our Steam Community Hub Discussion Boards, or on our new official forums!

Feedback and suggestions are exactly what turned ZPS into what it is today, and your opinions will continue to help mold this game during our journey into the future together! We look forward to hearing your opinion!

AngelScript Plugins

We understand that the capability of AngelScript, and the amount of available plugins are pretty limited right now. But AngelScript is very early in its implementation into ZPS, there will be many more improvements to come. We'll be awaiting your requests and suggestions for new plugins (as long as they fit stock gameplay or we see a use for them, if not perhaps someone else from the community will create it for you), and hooks required to create your own plugins.

These requests and suggestions can be shared with us on our Steam Community Hub Discussion Boards, or on our new official forums!

We also have a Plugins sub-forum on our new official forums where you can share your plugins with the community! You can view the ZPS AngelScript API here!

ModDB's 2017 MOTY Awards

Phase 1 of the ModDB 2017 Mod of the Year Awards has ended, and Phase 2 has begun. This means the Top 100 have been selected, and there will be another 10 days of voting to determine the victor of 2017!

Last year we ranked in at # 85, and we made it into the Top 100 again this year thanks to all of you! We're very grateful to have such an amazing and supportive community! But we're going to need your help again this year ranking better in Phase 2, let's see if we can do it!

Please vote for us again, but don't forget about your other favorite mods! Voting will enter you into the draw to win games from their #modlove collection.

Tell your friends that Zombie Panic! is back from the dead!

See you in-game!

Follow us on social media at:


- Zombie Panic! Source Development Team

Reviving the Community and Prepare for v3.0 Release!

Reviving the Community and Prepare for v3.0 Release!

News 4 comments

We hope everyone's as excited as our team is, as we're only 4 days away from the release of v3.0! We're working hard on the final polishing of the build...

v3.0 Has A Release Date! And It’s the Biggest Update Yet

v3.0 Has A Release Date! And It’s the Biggest Update Yet

News 16 comments

We’re happy to finally be able to announce that the v3.0 update for Zombie Panic! Source will be released on the 8th of December, this year! We've so...

Summer Development Progress Update

Summer Development Progress Update

News 10 comments

Like our last announcement, we have so much to discuss about our development progress and what we've done the past few months. While our main priority...

v3.0 Info, Release Window, & Now Accepting Team Applications!

v3.0 Info, Release Window, & Now Accepting Team Applications!

News 11 comments

The development has been, and still is, an incredible taxing but also enjoyable experience. Despite our team consisting of people from different cultures...

RSS Files
WorkHazard OST

WorkHazard OST


Pithole (WorkHazard) OST made by our sound designer KaempeLaeske

Zomboeing OST

Zomboeing OST


Zomboeing OST made by our sound designer KaempeLaeske.

FrozenHeart OST

FrozenHeart OST


FrozenHeart OST made by our sound designer KaempeLaeske.

ZPS - Horde

ZPS - Horde

Music 2 comments

New Zombie Panic: Source ambient track "Horde" - By KillahMo

ZPS - Barricade System

ZPS - Barricade System


Zombie Panic: Source v1.5 will introduce the ZPS Barricade System. Here is a short preview of it in action. (Note: The HUD display is not visible in the...

ZPS - Descent

ZPS - Descent

Music 1 comment

New Zombie Panic: Source ambient track "Descent" - By KillahMo

Comments  (0 - 10 of 2,918)

Holy crap, I had no idea this was still being updated. I used to be super involved with the forums way back in like 2009, making maps and stuff. Maybe I'll download ZPS again and see if people are still playing on Cabin. The worst map.

Reply Good karma Bad karma+1 vote

do you accept donations ?

Reply Good karma Bad karma+1 vote
Tabajara77 Creator

We're not accepting donations. It's a free mod. Only way to support us is sharing this mod with your friends!

Reply Good karma+1 vote

Wow guys, amazed to see you still working at this. It was one of my favourite Half Life 2 mods. Thank you for some awesome memories and good luck!

Reply Good karma Bad karma+6 votes

Amazed to see this mod is ALIVE and not dead like so many others

Follow through!

Reply Good karma Bad karma+3 votes

And of course, the port over to Source 2013 is a fantastic step in this Mod's direction and opens up new opportunities in the game itself; I'm more excited to be receiving a new character after such a extended while, but all in all, thank you for your contributions to this Mod after so many years Community Members.

Reply Good karma Bad karma+5 votes

im crying now, you guys are still alive

Reply Good karma Bad karma+3 votes

Epic, thanks for the new maps!

Reply Good karma Bad karma+5 votes

Hopefully monochrome will have the sense to go back to it's roots and make a zombie panic standalone, maybe for source 2? As long as they keep it similar to zombie panic it'll be a hit and all the old zps players will return :')

Reply Good karma Bad karma+3 votes

Still playing this classic mod. Still a few servers out there, but not nearly as many as there were when it was first released. Such nostalgia. I'd like to see a remastered version of Zombie Panic.

Reply Good karma Bad karma+4 votes

Grogg doesnt work you scammer

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1246 votes submitted.

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Highest Rated (13 agree) 10/10

Well...this is the greatest HL2 mod I've ever play! and i hope you guys can keep your hard works on the new mod! it looks awesome!

Dec 15 2010 by oceaneyes


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RT @JohanEhrendahl: v3.0.3 of @zombiepanic_dev will have full Workshop support. Was a bit tricky due we don't have Engine Access. :P… T.co

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RT @ArmoredWhales: @zombiepanic_dev You guys did an AMAZING job with 3.0! I'm so proud of all the developers that made this possible.… T.co

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RT @ModDB: The Top 100 nominees for ModDB's 2017 Mod of the Year Awards have been revealed! See who's in the running, and cast… T.co

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