We Love It's Guide to…
In a multiplayer zombie outbreak, play as armed survivors barricading and completing objectives—or as undead hunting and infecting them.
Released 03 Oct 2008
Build Improvised Barricades
Hunt as Undead
Infect Human Players
Dive into the zombie apocalypse with Zombie Panic! Source: a cooperative, survival-horror first-person-shooter. A fast-paced standalone modification.
Developed by Zombie Panic! Team · Published by Zombie Panic! Team









Zombie Panic! Source is a multiplayer survival-horror shooter where players take the role of either human survivors or zombies. Survivors defend themselves against player-controlled undead, while zombies hunt the living and try to spread the infection.
As a survivor, scavenge for supplies and use firearms, explosives, and improvised melee weapons. Work with teammates to hold positions, barricade entrances with objects, or complete objectives such as restoring power and escaping. The panic action lets survivors flee when a defense gives way.
As a zombie, use abilities including enhanced vision to track survivors and coordinate attacks. Modes include survival, objective-based missions, and timed hardcore challenges; community-made maps and modified modes add further ways to play.
Players often remember the game fondly, especially its tense human-versus-zombie matches, improvised barricades, custom maps, and sessions with friends. Some also value the shifting team balance as survivors become infected. At the same time, many reviews describe difficulty finding active servers and wish the game offered bots or offline play; opinions about its current playability and later changes vary.
Dive into the zombie apocalypse with Zombie Panic! Source (ZPS): a cooperative, survival-horror first-person-shooter. A fast-paced standalone modification. Choose your team as the Undead or a Survivor. Enjoy their unique abilities, weapons, and challenges in this action-packed mod!
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 under a timer.
Custom Made: Enjoy all kinds of unofficial gamemodes by community modders that push the game to its limits using AngelScript or SourceMod plugins.
Zombie Panic! Source wouldn't be half the game it is without nearly two decades of community content and support. Over the years this has included countless custom maps, Workshop add-ons, and community servers running all sorts of modified gameplay that might fit your style! Official, custom-made, or both - pick your favorite!




| Platforms | Windows, Linux |
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| Achievements | 106 |
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| Multiplayer | Zombie Panic! Source is a multiplayer-only asymmetric team game with Survivors versus Zombies. It supports online PvP and also has cooperative teamplay within each side, especially for survivors completing objectives or holding out together. Players who die usually continue the round as zombies, reducing downtime. Community servers, custom maps, and server plugins significantly shape the multiplayer experience. |
| Multiplayer & mods | The game has official mod support, Steam Workshop support, custom maps, community servers, AngelScript and SourceMod plugin support, and unofficial custom gamemodes. Reviews state many servers run modified rules, altered infection rates, extra zombie health, custom character models, and map rotations. Mods can substantially change balance and mode variety. |
| Controller required | No |
| DLC / extras | 1 listed on Steam |
| Content notices |
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| Website | Official website |