Dive into the zombie apocalypse with Zombie Panic! Source: a cooperative, survival-horror first-person-shooter. One of the most popular Half-Life 2 modifications of all time.
User reviews:
Very Positive (106 reviews) - 93% of the 106 user reviews in the last 30 days are positive.
Very Positive (4,287 reviews) - 91% of the 4,287 user reviews for this game are positive.
Release Date: Dec 28, 2007

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Community-Made Mod

This game requires that you own a Source engine game such as Counter-Strike: Source, Half-Life 2, or Day of Defeat: Source. Click here for a full list of games that meet this requirement. Please note that Portal: First Slice and the bundled Half-Life 2: Deathmatch do not fulfill this requirement.

Click here to learn more about mods on Steam.

Install Zombie Panic! Source

Half-Life 2 Mod


Recent updates View all (237)

December 4

Nominations Have Begun For The ModDB 2016 MOTY! + V3.0 Previews

Hello, everyone!

The Phase 1 Nominations for the ModDB 2016 MOTY began a few days ago and will be open until December 11th. So go and vote for your favorite mods to give them a chance to make it into the Top 100 and be eligible to enter into Phase 2 of voting to become MOTY. As courtesy of ModDB, members from the community who vote have a chance to win a game from ModDB's #modlove collection. Be sure to register an account for a chance to win! You're not required to be registered to vote though, so if you don't want to make an account you can still vote.

Nominate ZP!S for ModDB's 2016 MOTY!

We're asking for you all to please nominate ZP!S for the chance to become ModDB's 2016 MOTY. We realize that ZP!S isn't as great or popular as it once was, but we're working hard everyday to make ZP!S even greater than it was before. Since we've won MOTY before, we may only be eligible to become an honorable mention. But we would still greatly appreciate it if you would visit our ModDB page and show your support by voting for us.

As a bonus, we'd like to share some screenshots with you to give you a preview of what's to come. It's important to note that this is all still work in progress, so it's still under development and subject to change. What you see here is by no means the final product for the release of v3.0.

Improved Animations

Below you can see the early stages of a big feature that we're very excited about: improved animations! No longer will the survivors use those klunky, old HL2/HL2MP animations. We're now employing animations modified from DoD:Source, which ships with Source SDK, with noticeable improvements in weapon wielding and movement.

Cascaded Shadow Mapping

Cascaded Shadow Mapping is another huge feature we've hinted at previously, and we think you'll be pleased with the progress. CSM allows us to give a fresh breath of life to our existing maps, giving them crisp shadows and making them look more natural. To use CSM you'll need at least Direct X 9.0c or higher.

Here's some previews of CSM:

Weekly Development Streams! Every Friday @ 9PM EST

We’ve also started a Twitch channel to give you a little sneak peek into development and engage with the community for a few hours every Friday at 9 PM EST.

Casei Magnus has been sharing his work on upcoming (and experimental) levels and designs. Join us each week to participate in the discussion, give us some feedback, share ideas, mingle with the devs, and have a good time - all to ensure that the new update ends up being what both our development team and community want out of ZPS v3.0. Maybe even catch a sneak peek of something every now and then.

Thank You!

Thanks to everyone who has done their best to support this game after almost 9 years of existence! We hope to keep ZPS going for many more years to come!

See you around,

- Zombie Panic Development Team

17 comments Read more

November 24

Nominate ZPS for: The "Test of Time" Award + Twitch Channel!

During the Steam Autum Sale, everyone has been given the chance to nominate their favorite games for various awards. We're currently working hard on the v3.0 build and we are hoping to breathe new life into the game and bringing in old as well as new players and communities, and for that to happen we need your help; We need to spread the word! You have already shown a tremendous support for the new update, and we are thankful for the excitement and dedication that so many of you display. These awards are a great way for the game to gain more recognition – and we’d love for you guys to nominate Zombie Panic! Source for The Test of Time Award! This is awarded to the game that has not only remained a blast to play throughout its’ history, but also the game with a community that is dedicated and involved. We believe ZP!S is that kind of game, and for that reason we’re asking all of you to help support us in nominating the game for this award.

Weekly Development Streams!

We’ve done our best to engage with the community for ideas and feedback, give insight into the development through sneak peaks and, starting tomorrow, Friday, November 25th, 9 PM EST, weekly mapping development streams. Casei Magnus will be sharing his mapping work on upcoming - and experimental maps and designs, where you can give feedback, share ideas and have a good time while discussing ZPS - all to make sure that the new update ends up being what both our development team and community want.

Progress on the 3.0 Build

The new update is coming. We have begun the playtesting phase where we make sure that everything is running as it should and that no bugs or exploits make it through to the launch. After the playtesting phase has completed, what will remain on our to-do list before the build is ready for launch is the Linux port and stress testing and hardening of the game’s netcode. Stay tuned and share the news with your friends!

Happy Thanksgiving everyone!

- ZPS Dev Team & Monochrome

20 comments Read more

About This Game

Dive into the zombie apocalypse with Zombie Panic! Source: a cooperative, survival-horror first-person-shooter. One of the most popular Half-Life 2 modifications of all time.
Choose your team as the undead or a survivor. Enjoy their unique abilities, weapons, and challenges in this high-paced, action-packed thriller.

The Teams

As a survivor, unlock large arsenals of firearms, explosives and improvised melee weapons. Can you stop the waves of undead? Will you engage the horde head-on, or barricade and fortify while your friends play sniper? If all else fails, Panic! Then run as if your lives depend on it… for they surely do.

As a zombie, you’re free to hunt the living like the rabid beast you are. Feast upon their flesh and unlock your inner berserker. Heightened zombie night-vision gives you the upper hand in dark environments. Infect survivors as the carrier zombie (patient zero), to weaken their defenses, then sadistically watch them turn on each other. Use it all to your advantage to strategics, ambush, conquer and destroy your oblivious living counterparts.


Zombie Panic! Source hosts a variety of game modes for excellent replayability. Explore the zombie apocalypse with:

  • Survival Mode: Put your ability to scavenge and survive to the test. Easily the top player choice.
  • Objective Mode: You’re on a mission. Whether it’s to escape or defeat the horde, you’d better use your brainz to find those keys, get the power back on, hack that computer, and get to the chopper! Otherwise… I think you know what happens.
  • Hardcore Mode: For experienced zombie connoisseurs, you and your teammates get to enjoy pitting yourselves against extra tough foes, and even rougher odds.
  • Assault Mode: Capture the Point. Points are awarded for completing side objectives, adding to the overall score of the players’ team which in the end decides the victor.

System Requirements

    • OS: Windows® 7 (32/64-bit) / Vista / XP
    • Processor: 1.7 GHz Processor or better
    • Memory: 512 MB RAM
    • Graphics: DirectX® 8.1 level Graphics Card (Requires support for SSE)
    • DirectX: Version 9.0c
    • Network: Broadband Internet connection
    • Storage: 8 GB available space
    • Sound Card: DirectX 9.0c compatible sound card
    • OS: Windows® 7 32/64-bit
    • Processor: Intel Dual Core 2.4 GHz Processor
    • Memory: 2 GB RAM
    • Graphics: Video Card Shader model 3.0. NVidia 7600, ATI X1600 or better
    • DirectX: Version 9.0c
    • Network: Broadband Internet connection
    • Storage: 8 GB available space
    • Sound Card: DirectX 9.0c compatible sound card
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