Zombie Panic! Source

Zombie Panic! Source

Zombie Panic! Team · October 3, 2008 · Free to Play, Zombies, Multiplayer, Action, Horror

Zombie Panic! Source is free to play — no purchase needed. We track it so you know if that ever changes.

PC
Very Positive85% · 7,85616playing now
This game is free to play. Get it on Steam →

Trailers & screenshots

Watch the Zombie Panic! Source trailer →

Zombie Panic! Source price

Zombie Panic! Source is free to play — there is no purchase price, on Steam or anywhere else we track. We keep watching it, so if it ever stops being free the price history on this page will show when that happened and what it changed to.

About Zombie Panic! Source

✦ AI summary

Lead a team of Survivors fighting off relentless zombie hordes with diverse weapons and tactics, or play as the Undead with supernatural abilities to hunt and infect the living in this action-packed cooperative mod. Zombie Panic! Source stands out with asymmetrical team gameplay, multiple modes including Survival and Objective-based missions, and nearly two decades of community-created maps and custom content that keep the apocalypse fresh.

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!

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.

The Gamemodes

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.

Community Servers and Workshop

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!

Zombie Panic! Source — game info

Platforms
Windows, Linux / SteamOS
Steam Deck
Playable
Player modes
Online PvP, Online co-op
PC Game Pass
Not included
More games like this:Linux games

What Steam players say

Recent verbatim reviews from Steam — separate from playze.io community reviews below.

Recommended Jul 27, 2026
Zombie Panic! Source is a free-to-play multiplayer horror shooter developed and published by Zombie Panic! Team that has managed to remain relevant long after many games from its era faded away. Built on Valve's Source engine, it transforms the traditional zombie survival formula by placing every participant under human control, whether they are fighting for survival or spreading the infection. Instead of relying on scripted enemy behavior, each match unfolds according to the decisions, coordination, and creativity of real players. This design keeps every session feeling fresh, as no two encounters ever play out exactly the same way. The game's greatest strength lies in its asymmetrical gameplay. Survivors begin with access to firearms, melee weapons, explosives, and other useful equipment, but resources are intentionally scarce. Ammunition must be conserved, health is precious, and every teammate plays an important role in staying alive. Players must communicate, secure defensible locations, search abandoned areas for supplies, and work together to complete objectives while constantly watching for attacks from every direction. The tension comes from knowing that a single mistake …
2 found this helpful
Not recommended Aug 21, 2026
Game's been completely ruined after the new update. Not worth playing anymore lol. Stay away...
1 found this helpful
Recommended Aug 7, 2026
Been a fun game for years, would like to see a new release.
1 found this helpful
Recommended Aug 2, 2026
I feel like this game and No More Room In Hell would be alot better if merged together as one game as i feel this game utilizes that game's ideas better (& without having horrible controls) while also lacking some basic features (like bots) that NMRIH offered. Haven't ran into any players yet so i cant speak for balancing, but the premise is interesting. I like that the patient zero zombie can speak. Like he has resisted or not fully succumbed to the brain rot yet wish the game had the option to play with bots when players arent available/users have high ping. I also like that it isnt obvious when and if you got infected and have a chance to cure it early at the cost of wasting rare medicine that you may not have or might not have needed if rng didnt infect you and that infected survivors are essentially on both teams at once. (Instead of NMRIH where getting killed & reainmated as a zombie just turned your character to a NPC) They have the choice to kill themselves (would work great with NMRIH's suicide mechanic), help the survivors (at a safe distance) or help the zombies by attacking/weakening the unsuspecting survivors like a traitor in TTT. Thats the one thing i didnt like ab…
1 found this helpful
Recommended Jul 16, 2026
Classic Zombie game
1 found this helpful
Recommended Aug 29, 2026
zoby

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