Situation Outbreak is an Orange Box mod about the impending zombie apocalypse.

Armed with nothing but a 9mm and a pair of brass knuckles, you must do whatever it takes to survive against the thousands of zombies that used to be your friends and neighbors. The cost of failure is nothing less than your free will.

There are no heroes. No single person can save the world and there are not enough bullets to go around. The only thing left to do is to kill the damned, hoping that you don’t end up like them.

This is not your average, run-for-your-life zombie mod. Quickly, here are a few things that set us apart:

  • Custom dynamic difficulty and ambient sound systems that adjust gameplay in real-time according to map toughness.
  • Seven awesome gamemodes, like Holdout and Extermination.
  • A completely new arsenal of custom weapons – all developed in-house by Agent Red Productions.
  • Survivors can buy weapons and ammo by cashing in points they earn for killing Undead and zombie NPCs.
  • Gain experience and level up to obtain useful bonuses and powerups.
  • Fight off hordes of zombies by hunkering down behind a barricade or going rogue.
  • Make your own maps using our fully-developed, easy-to-use custom entity set and in-depth tutorials.

We pride ourselves on being the most active zombie-based mod on the Source scene; new updates are being released just about every month!


The Agent Red Productions team is currently working on our latest project, Lethal Stigma.
Check us out @ and


One player is chosen to become the host of the zombie infection - and must infect the rest of the players by tearing into their tasty flesh! This is the classic outbreak style of gameplay. Either the zombies rule the earth, or the humans retake what was theirs!


Survivors must defend themselves against the hordes of zombies NPCs for a specified amoutn of time. Be sure to keep the zombies off your back - once you go down, you're not getting back up.


Survivors only have a few minutes to escape before being overrun by zombies! No one must be left behind! One player is chosen to be the host of the infection at the start of the round. Better hurry, zombies don't raise themselves!


Similar to Survival, Survivors will find themselves defending their fellows against wave after wave of zombie NPCs. However like Escape, there's a twist: the Survivors must also defend a specified holdout area until time runs out. Therefore the mission is not only to survive the infection, but to contain it, which makes this gamemode notably harder than the others.


Often deemed an Infection-Survival hybrid, one player is chosen towards the start of each round to be the zombie overlord. As a zombie overlord, a player is capable of killing Survivors for points either by using their zombie claws or by spawning their own army of zombie NPCs to command. These points can then be exchanged to spawn even more zombie NPCs. If a zombie overlord is ever killed during the middle of a round, they are spawned as a Survivor and another zombie overlord is chosen to take their place. This continues until a zombie overlord successfully destroys the human race or until time runs out, in which case the Survivors win.


Often deemed a Escape-Survival hybrid, Survivors must complete a set of objectives before they can escape to safety with the additional twist of having to defending themselves against endless waves of zombie NPCs. If the Survivors fail to complete all of their objectives before time runs out, they lose, making this gamemode the most versatile and open-ended as far as what objectives the Survivors are assigned to complete. As an added challenge, players never respawn once they are killed.


At the beginning of the zombie apocalypse when there was still organized government, the Military was willing to do anything and everything it could to prevent the spread of the infection - even if it meant killing their own citizens. This fast-paced, epic deathmatch-style gamemode pitches the Survivors against the Military. Anything goes, and ultimately only one force can come out on top.


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9 comments by jamespizzurro on Aug 14th, 2012

After five glorious years of developing modifications for the Source engine, the last year of which we’ve been largely inactive, it is with a heavy heart I announce the official closing of Agent Red Productions. Work on all projects, new and old, have ceased indefinitely. Our website will still be up for a couple more months until the domain name expires, but with limited to no support.

I hope this hasn’t come as a shock to anyone. That said, I do apologize that we were not able to finish the projects we set out to complete. Ever since Lethal Stigma’s development team all but disappeared and Half-Life 2: Retaliation’s development came to a close following an unfortunate data loss incident, our studio has had little to no in-house support, only retaining a core few active members along the way. It has always been my intention to complete development on Situation Outbreak 2, and I believe there’s still plenty of room for improvement with Contingency, but we simply do not have the resources to see those projects through at this time, nor have we for the past year. Perhaps one day they’ll see the light, but in the meantime, we cannot continue.

I want to personally thank everyone involved in the development of all of our mods throughout the years, regardless of contribution or commitment. We could not have gotten as far as we did without you. I would also like to thank everyone who has supported us and played what we’ve produced, especially those who have been with us since our inception. Our projects were always made for you, the community, and so we sincerely hope you’ve enjoyed them.

If you have any final comments, questions, suggestions or concerns for any of us here at Agent Red Productions, please email me at and I will get back to you as soon as possible.


James Pizzurro
Co-founder of Agent Red Productions

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Situation Outbreak - v1.61 Source Code

Situation Outbreak - v1.61 Source Code

Jul 13, 2010 Full Version 7 comments

A full release of Situation Outbreak's source code available for non-commercial use and open for the Source modding community to use.

Situation Outbreak v1.61 (FIX)

Situation Outbreak v1.61 (FIX)

Jan 29, 2010 Patch 15 comments

Only download this if you have already successfully installed Situation Outbreak v1.61 on your computer.

Situation Outbreak v1.61 (FULL)

Situation Outbreak v1.61 (FULL)

Jan 28, 2010 Full Version 26 comments

This installer is only for those who DO NOT have Situation Outbreak installed on their computer.

Situation Outbreak v1.60 to v1.61 (PATCH)

Situation Outbreak v1.60 to v1.61 (PATCH)

Jan 28, 2010 Patch 4 comments

This installer is only for those who already have Situation Outbreak v1.60 installed on their computer.

Situation Outbreak v1.61 Dedicated Server (FULL)

Situation Outbreak v1.61 Dedicated Server (FULL)

Jan 27, 2010 Server 14 comments

This installer is only for those who DO NOT have a Situation Outbreak Dedicated Server installed on their computer.

Situation Outbreak v1.61 Dedicated Server (PATCH)

Situation Outbreak v1.61 Dedicated Server (PATCH)

Jan 27, 2010 Server 0 comments

This patch is only for those who already have a Situation Outbreak v1.60 Dedicated Server installed on their computer.

Post comment Comments  (60 - 70 of 2,431)
pe_fontes Jun 23 2011, 4:22pm says:

this mod reminds me of nazi zombies in cod

0 votes     reply to comment
BOBgoesBOOM Jun 27 2011, 7:36am replied:

I think it's like Nazi Zombies mixed with Left 4 Dead and a sprinkle of awesome.

0 votes     reply to comment
ZoombieVega Jun 15 2011, 11:39pm says:

If you do just send me a message.

+3 votes     reply to comment
imurderragdoll Jul 13 2011, 6:11am replied:

whats your steam username,and il'l add you then we could play.

+1 vote     reply to comment
Mr.Mellon May 31 2011, 4:20pm says:

Ahh I remember when you just started and I was like (This looks kinda boring) Now look I play this more than any mod ever grats.

+2 votes     reply to comment
jamespizzurro Creator
jamespizzurro May 31 2011, 6:23pm replied:

Haha, thanks for following us on our little journey. I think we've all learned a lot since the beginning of this mod's development. I certainly have anyhow.

+1 vote   reply to comment
deadplug May 22 2011, 4:48am says:

Is there any way to revive a fallen teammate?

If there is, maybe the maps wouldn't be so impossible when you are playing with a small group of people.... Is there something I'm missing?

+1 vote     reply to comment
jamespizzurro Creator
jamespizzurro May 22 2011, 2:56pm replied:

Nope, you cannot revive other players. Somewhat ironically, SO was not designed for small groups of players to hop on a server and play with one another despite the fact that this is how most people play it now. Some maps were designed to be extremely difficult though, like so_obj_h1n1.

...stay tuned for a HL2 project of mine that is designed for small player counts though. =P

+1 vote   reply to comment
joseph2332 May 15 2011, 1:31pm says:

im goind to play out break in a minuite ok join me when i post again

+1 vote     reply to comment
jamespizzurro Creator
jamespizzurro May 5 2011, 6:43pm says:

New permanent SO 1.61 server is online:

+1 vote   reply to comment
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Release Date
Released Sep 13, 2009
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618 votes submitted.

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Highest Rated (3 agree) 8/10

The mapping could use some work, so do the models, gun models, sounds.


And for multiplayer play, delete those ghosts, no one likes them.

Jan 4 2010, 5:03pm by AUG_DUDE

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