OUTBREAK v2.1: Infectious Zombie Mod for /

by motorsport71
Please explain why you're reporting this file:

This one was written so and users alike could enjoy.
(Also tested on EFLC's TLAD, seemed to work okay and had another player confirmation it works on GTA IV version

New in v2.1
Added independent Pedestrian Density Control for "Zombies Only" and "Zombies and Pedestrians" in the INI.

Decreased Size of Infection% and Health Side HUD Lettering.

Slowed Rate of Infection 20%

New in v2.0
Better Stability and Climbing Zombies thanks to reviewing HippieCommunists ZombieZ.cs.

Toggle On / Off Player Immunity

Slowed Down Infection Level / Health Loss by 25%

Added a "Blackout Notifier", like a pulse, to remind you your health is low (20%) when Immunity is OFF / player is infected.

Added 4 quick travel safe houses and several places to inspect on the map, and a hidden weapons cache of unknown location...


There are, of course, the two modes:
Zombies and Pedestrians...
With zombies and pedestrians the infection is fast spreading. Everybody can get it. Bodyguards, police, even you...

There is an infection meter for once you've been "Bitten". When / before it reaches 100% you need to find an ambulance, otherwise your health starts a countdown. Use the "Heal" key next to the ambulance to get the cure. Until then the heal function can bring you back up to 78% health as long as you hold it and aren't incompacitated. Just pay attention.

Then there are Just Zombies...
In just zombies you can get infected just the same, there just won't be screaming pedestrians and traffic. You won't see many zombies running around either... unless you make your presence known. Car alarms, gunshots, consistant car honking while the car is stopped... well, those are like dinner bells. Then they come from out of the woodwork.

You can either be Niko, a cop with a partner, or a N.O.O.S.E. squad.

With The Body guard option turned on everytime one is killed or turned turned into a zombie another will find it's way to you. As the cop or Niko you will always end up with a group of four.
As the NOOSE squad you can end up with as many as eight. Hehe.

There is also the option to turn that off so the stop respawning, kill them all off, or make them invincible.
NOTE: They die if you change from Zombies back to Zombies and Pedestrians. They were retaining a Psychotic aspect and killing everything that moved... not good for healthy civilians :p

While the mod is active all the hospitals are marked on the map with hospital markers / blips. Doesn't mean all hospitals have ambulances...

There is an option for random events as well. Car explosions, random armed civilians, little things.

Weapons will be spawning at random around you, but that doesn't mean go hog wild and waste ammuntion.

Also, if you want the police to respond to Niko killing zombies while "zombies and pedestrians" are active you can activate that as well, making them treat him as a criminal instead of defending himself.

The README! has links at the bottom that may help some. Please read it.

When changing the big settings like Zombies to Zombie and Pedestrians i recommend bringing the player to a complete stop whether it be in a vehicle, on foot, whatever be it. Give the world a moment to to settle then change it. I also recommend playing the mod on a fresh restart of the game. Hope you enjoy!
8.79/10 - 72 votes
Downloads: 66,331
Added: March 27, 2012 5:15PM
Last Downloaded: May 24, 2017 7:04AM
File Size: 17.04 KB

I dunno who rated this 1/10, I rated 10/10 even though there are lots of zombie mods like these. Great job :D
Posted on March 29, 2012 3:35AM by earljanxxx09
huhu, good mod :D

50/10 from me :3
Posted on March 29, 2012 7:25AM by biohazard001
Thanks guys. If anybody trys any other game versions let me know if it works!
Posted on March 29, 2012 8:51AM by motorsport71
Does this work on multiplayer?
Posted on March 29, 2012 9:21AM by SpoonTheMan
man this is so awesome i'm gonna test it
Posted on March 29, 2012 1:24PM by janusantsky

I didn't write this one for MP and never tested it for that so i don't know.


I hope you enjoy it!
Posted on March 29, 2012 2:37PM by motorsport71
really good amazing work, now the next step is small mission maybe ?
Posted on March 29, 2012 2:49PM by janusantsky
does it work for 1.0.3? Please make one for 1.0.3 if not
Posted on March 29, 2012 4:47PM by mrpushy88

I don't really know if it does, if you try let me know if it's compatible?
Posted on March 29, 2012 4:50PM by motorsport71
Posted on March 29, 2012 5:12PM by mrpushy88
Posted on March 29, 2012 5:17PM by mrpushy88
I haven't dl'd yet, and I wanna know if you can get rid of the "infection and health" HUD. Also, you guys should check out the Ultimate Zombie Survival Base to pair with this mod :)
Posted on March 29, 2012 5:34PM by Throat Poka
@Throat Poka

No, the "infection and health" HUD's are not toggleable as far as view goes, as far as function goes part of the feel of the mod is that you don't want to get "bit" or "scratched" whatever be it so you are always watching your back...


Thanks for checking!


I've tried to "write" missions before... it took me like two days to get a ten minute mission that would work about 20% of the time at the end... I can't really put that kind of time into modding anymore, i got some serious real life stuff coming up.
Posted on March 29, 2012 8:22PM by motorsport71

how do I use this?

is it ok to use with simple native trainer?

put in the "scripts" and squeezed "F4" and nothing happened ...

You know how I help?

Thank you brother!
Posted on March 30, 2012 1:39PM by jorgehunter
did u lag out @jorgehunter

and also, what version of gta u playin.

Posted on March 30, 2012 2:27PM by mrpushy88
@mrpushy88 Bro:

everting in Full...max....
Posted on March 30, 2012 4:32PM by jorgehunter

check out the readme, at the bottom are all my customary answers and links to fix .net scripthook issues etc. Let me know if you've tried them...
Posted on March 30, 2012 4:47PM by motorsport71

Oh, and yes it's okay to use simple native trainer. Just remember f4 disables SNT by default so don't have it up when you go to enable the mod once you get it working :)
Posted on March 30, 2012 4:52PM by motorsport71

yeah brother!

it's worked!

mod 100%!


make more!!!
Posted on March 30, 2012 5:31PM by jorgehunter
this is awesome!!! this mod says error in zombies and pedestrians then no more zombies spawn though. Other than that, I LOVE YOUR MODS!!! 100/100
Posted on March 30, 2012 7:29PM by MrMdn820

Is it after you've made any changes, like to a NOOSE squad or to zombies and back to zombies and pedestrians? If not, do you have any other mods on like a replaced ped.dat file for more pedestrians? Also, if the game is lagging a bit while running the mod maybe try turning your graphics resources down a little bit. The mod requires a little more processor power than the game itself normally does. See if those help.
Posted on March 30, 2012 8:00PM by motorsport71
ALSO for anyone who has an "error" come up, press f4 to wait for any other parts of the mod still working to shut down and wait for a little bit, preferably just go to another area. Press the tilde, "~" key, and type in "reloadscripts". Press enter and then use F4 to restart the mod.
Posted on March 30, 2012 9:27PM by motorsport71
error with


someone approve my mod!
Posted on March 31, 2012 2:09PM by aztec2012

Posted on March 31, 2012 2:49PM by motorsport71

Posted on March 31, 2012 3:03PM by jorgehunter
@aztec2012 what mod bro
Posted on March 31, 2012 7:21PM by mrpushy88
my mod does not approved yet which uploaded 1 week ago!

handling + explosion + new enb settings mod
Posted on April 1, 2012 8:49AM by aztec2012

email an adiminstrator...
Posted on April 1, 2012 10:37AM by motorsport71
just tried pretty cool, is there a way to win or is it endless?

aztec is it your mod or did you forget to credit the author of the work u r tweaking like airstrike ;P
Posted on April 1, 2012 12:13PM by jitsuin
no no no no no no no no no

IT IS MY MOD I try it 3 months!
Posted on April 1, 2012 1:08PM by aztec2012

It's endless, unless you select f4 :) No mission coding, not yet
Posted on April 1, 2012 2:39PM by motorsport71
does it's work on ??

Posted on April 3, 2012 7:09AM by Handyfisher

I really don't know, i tried only as far back as due to popularity but mrpushy88 asked the same thing about, tried it and it worked for him :) If you decide to give it a shot and let me know it's compatible. Also, view the readme, it has a lot of valuable information in it. I don't know about .net scripthook applications for version though...
Posted on April 3, 2012 8:42AM by motorsport71
Hey motorsport71 anything great coming up?
Posted on April 6, 2012 8:16AM by mrpushy88

working on an update for better stability, chatted with guys on forums to find better ways to keep errors like "error in 'zombies and pedestrians'" etc. I also looked at hippiecommunist's zombiez.cs script and really liked the way his zombies climb fences, cars, etc. I'm going to see if i can use his model to make mine do the climb in a similar way.

I think i'm also going to put the Player Infection on a toggle because some people don't like it, though i think it feels more like a real zombie apocalypse where you are always on your toes.
Posted on April 7, 2012 12:15PM by motorsport71
@motorsport,can you help me the mods it's now working,can you give tutorial how to install


Posted on April 8, 2012 12:43AM by Handyfisher

Is part of hippiecommunist's script include running zombies?Cause that would be very cool. And do we re-download this when you update this mod or will it be a new one?
Posted on April 8, 2012 8:52AM by mrpushy88

When I'm finished with this update i'll see if i can make an updated .net script mod installation tutorial.


No, hippiecommunist's script didn't have running zombies. In my Left 4 Liberty: Infection mod i could make runners because of the use of relationship groups, in older versions i cannot seem to use them. So to make this mod compatible with - i have to run off the same base principles as his. I've just altered the heck out of his script to make it allow spreading infection, body guards getting attacked, my options, as well as reinforced my stuff. I did, last night, get a preliminary test version ready.
Posted on April 8, 2012 12:37PM by motorsport71
@motorsport71,ok Bro thank's
Posted on April 8, 2012 7:32PM by Handyfisher
Posted on April 12, 2012 12:39PM by ory1124
I tried with my EFLC today and there were bugs for that version. I'll retest when done with script, but i'm not sure if it'll be compatible or not.

For those who care:

I Added a Toggle off / on Player Infection For "Immunity"

Added "Blackout" Pulse Notifier to remind you you're low on health while infected. Makes you feel like you're about to pass out.

Slowed Down Infection Timer / Health Loss by 25%, making it slower.

Added 4 "quick travel" safe houses to teleport you and your group to, several places to inspect - and a large, hidden weapons cache of unknown location...

Based Some of core Script off of hippiecommunist's zombiez.cs for better stability and climbing zombies. Then Altered the crap out of it :)

Now has a variable pedestrian density system and two dimensional ped deterent. Keeps streets looking "emptier" from afar, as well as less just walking pedestrians during "Zombies"

Zombies are harder to kill so having a group of bodyguards doesn't make it too easy.
Posted on April 17, 2012 10:29PM by motorsport71
HippieCommunist's ZombieZ scrip is better.
Posted on April 18, 2012 2:12AM by gunnery18

the feel of the script, the exploding boats hitting the ground lol, or the stability? what do you mean by the statement?

I'm not hurt by the statement, i'm always happy to hear input. I looked over his script and found seen how his zombies climb so i used that to make the update's climb as well. I also learned about the way his was set up to make it more stable. He uses C# (.cs), where i use Visual Basic (.vb) so i had to convert it then see how his worked. I had to modify my entire script / use his premise to make it work for me. This next update will be strongly based off of his THINGS I LEARNED FROM HIS SCRIPT, some basic ideas, and his climbing zombies.

I did with a lot of time, make my own conversion of his script in .vb to play it and compare it to his .cs and was able to duplicate it with excellent results. So in essence I have a copy of ZombieZ.vb :P
Posted on April 18, 2012 6:59PM by motorsport71
Hey man, I couldn't make an account because the capcha wasn't working but finally made an account in order to support ya! I updated to 1.0.7 because I found your left 4 Liberty script so awesome and wanted to try it.

Do you recommend replacing it with this one?(Haven't tried this yet)

I do enjoy hippiecommunist's stuff too! Although your zombie mod is focused on zombie apocalypse, his is just a small addition, Keep up the good work brother!!! Its amazing! runnin bein chased by the horde is awesome!
Posted on April 22, 2012 9:34AM by expandingeye

I actually am becoming more fond of this one, and i'm about done with the update which is WAY better. Wait for the update. It'll be out within the week. Thanks!
Posted on April 23, 2012 11:38PM by motorsport71
i always get Error:

2012-04-28 00:43:18 - Error during Tick in script 'ZombiesAndPedestrians':

GTA.NonExistingObjectException: Invalid call to an object that doesn't exist anymore!

at GTA.Ped.get_Position()

at ZombiesAndPedestrians.ZombiesAndPedestrians()

at ZombiesAndPedestrians.ZombiesAndPeds_Tick(Object sender, EventArgs e)

at System.EventHandler.Invoke(Object sender, EventArgs e)

at GTA.Script.TryTick()

at GTA.Script.DoTick()

at GTA.ScriptThread.OnTick()
Posted on April 27, 2012 11:42AM by Izzykit123
dude how do you toggle immunity on/off??
Posted on April 28, 2012 9:39PM by jordo85

try the version 2.0 i just released


i just put in in the version i released today, 5-2-2012
Posted on May 2, 2012 4:31PM by motorsport71
Hey man,how do you increase zombie spawns in Peds and Zombies? I see the variables to edit but there are a couple of them. Dont know what numbers to put, i just want alot of zombies spawning In peds+zombies. Also after driving away a certain distance the zombies fall down and down or worse dissapear, this did not happen in your earlier release. Does this version have a variable to keep the zombies for a certain distance like the last version?
Posted on May 5, 2012 1:03PM by Whitemike20052

The way it is now is "safe" for general computer resource usage so it won't generally crash under a memory overload. For more distancing between you and zombies during zombies and pedestrians:

Under the "ZombiesAndPedestrians_Tick..."

..If Exists(zombie) AndAlso Zombie IsNot Nothing AndAlso zombie.isingroup = False AndAlso player.character.position.distanceto(zombie.position) > 58.0F AndAlso zombie.isrequiredformission = True Then



End If

Change the > 58.0f to a larger number. Each value of 1.0 = approximately 3 meters. This is the distance away from the player the zombies are "removed" from memory. The higher the value, the larger of a diameter of infection will suround you. THIS ALSO CAN CAUSE YOUR COMPUTER TO SLOW DOWN / CRASH... It is monitering a larger area.

For a faster "spreading" infection during Zombies and Pedestrians,

again Under the "ZombiesAndPedestrians_Tick..."

near the bottom of the sub you'll see this:

r = Ra(0, 8)

If (r = 3) Then

Dim pedzom As ped() = world.getpeds(player.character.position, 21.0F, 4)

For Each zombie As ped In pedzom

If Not Exists(zombie) OrElse zombie Is Nothing Then

Continue For

End If

You can change r = Ra(0, 8) to minumum r = Ra(0, 6), it will make the chances of grabbing zombies faster OR

"world.getpeds(player.character.position, 21.0F, 4)" = If you increase 21.0f it increases the diameter it searches for eligible zombies, and if you change the 4 to any number that is the number of zombies it looks to make.

Posted on May 6, 2012 10:30PM by motorsport71

The default way i send it out is safe enough to play on my laptop, a basic hp with a dual core amd p360 and ATI 4250 (on board graphics) for over an hour without a hickup. Other than it looked like i was playing on atari :P
Posted on May 6, 2012 10:35PM by motorsport71
Posted on May 10, 2012 9:17AM by retex
I can't get the * thing to work. Any of your mods.
Posted on May 12, 2012 1:05PM by GTAforever35

Sounds like your having trouble with your .net scripthook working. When you log into gta, press the tilde "~" and see if a green screen comes up. Remember, if you're using a laptop hit the function key before hitting F4
Posted on May 13, 2012 9:04AM by motorsport71
Hey motor.

I changed the values and they worked good. IDK what you changed on the stability part but the earlier version i can get over 30+ zombies on screen with little slowdown and in this one the game starts to 'hiccup' wheres theres around 20.

Is there anyway to make your earlier release stable like this one so the error with Zombies + Peds doesnt show up?

Also it seems after leaving the area im playing in no more civs show up. Thers nothing but cars on the streets. People are driving just no civilians walking until i reset the script.

While im here how do i increase zombie spawns in Zombies only?

Also is it possible to make cops show up with their Sirens ON? Kinda dumb how they show up and start blasting with their sirens off.
Posted on May 22, 2012 5:52AM by Whitemike20052
@ Whitemike20052

Okay, at the bottom of ZombiesWithoutPedestrians_Tick

you'll see:

If zomcount >= 15 Then

If player.character.isinvehicle = False Then

world.peddensity = 0.1

'game.displaytext("Ped Density = 0.1")

End If

End If

If zomcount >= 6 AndAlso zomcount <= 14 Then

If player.character.isinvehicle = False Then

world.peddensity = 0.4

'game.displaytext("Ped Density = 0.4")

End If

End If

If zomcount <= 5 Then

If player.character.isinvehicle = False Then

world.peddensity = 0.6

'game.displaytext("Ped Density = 0.6")

End If

End If

So Delete all of those and replace it with this:

If zomcount <= 24 Then

If player.character.isinvehicle = False Then

world.peddensity = 0.5

End If

End If

If zomcount >= 25 Then

If player.character.isinvehicle = False Then

world.peddensity = 0.1

End If

End If

That will keep you around 25 active zombies.

I also made you something for your traffic question and posted it on gtaforums under your thread.
Posted on May 22, 2012 11:59AM by motorsport71
Nice mod bro! 10/10
Posted on June 5, 2012 1:36PM by ubtri
Wow thanks motor. Just saw that post, been away from GTAIV for awhile playing Fallout 3. That game just sucks you in man. Thanks for the variables, ill check em out and for the traffic too.
Posted on June 7, 2012 5:57PM by Whitemike20052
Great mod, one thing though. I must have running zombies :D Please build this into the Mod :)
Posted on June 9, 2012 2:01PM by BenTJGough

i would make runners for it but won't let me :(

That is why i made this mod, so people with / could have an okay zombie mod to play. Otherwise they would all be able to just download my "left 4 liberty infection" mod.
Posted on June 17, 2012 9:07PM by motorsport71
hey man great mod but when this mod is in my gta 4 folder and im ingame and its not even active, the police never chase me =S
Posted on June 20, 2012 5:09AM by jordo85
Wew, cool mod man, but i think it needs more Resource huh? Still, 10/10 for you! :D
Posted on July 1, 2012 9:36PM by Kalasnikov28
Greetings, great work on the mod :P. I do have two issues though, not sure if it's intended or something went wrong with my game? First, police officers are rare and when they show up they don't do anything, they just stand around and are invincible, then a few will turn Z all of a sudden. Anyway to fix this? I don't think I'm alone in enjoying fighting a losing battle together with local law enforcement against the infected.

Secondly, in pedestrians and zombies, the pedestrians suddenly turn zombie when I approach them. It's a bit ugly to see them walking around normally, then without warning turn out to be a brain eater.

Lastly my bodyguards don't react to zombies until they get attacked by them :(.

Help/enlightenment would be greatly appreciated :). Regards!
Posted on July 2, 2012 10:09AM by trance
Greetings, great work on the mod :P. I do have two issues though, not sure if it's intended or something went wrong with my game? First, police officers are rare and when they show up they don't do anything, they just stand around and are invincible, then a few will turn Z all of a sudden. Anyway to fix this? I don't think I'm alone in enjoying fighting a losing battle together with local law enforcement against the infected.

Secondly, in pedestrians and zombies, the pedestrians suddenly turn zombie when I approach them. It's a bit ugly to see them walking around normally, then without warning turn out to be a brain eater.

Lastly my bodyguards don't react to zombies until they get attacked by them :(.

Help/enlightenment would be greatly appreciated :). Regards!
Posted on July 2, 2012 11:45AM by trance

the police should engage you if you hit f12(default key anyway) to enable being wanted them. They have a low presence in general because they are being spawned in the games normal cop to pedestrian ratios.

As far as the Zombies and Pedestrians go, the script is grabbing random pedestrians to keep adding to the infection in addition to it spreading. It's usually coincidence they are chosen in front of you.

Bodyguards were difficult to do because version doesn't offer "relationship groups" so i couldn't make bodyguards "hate" zombies. Thats why they react in that fasion. I did the best i could there, and the script works the same for that version up to
Posted on July 5, 2012 9:44PM by motorsport71
Posted on July 6, 2012 9:16PM by GATOO
i tried to put this mod in did not work i tried but nothing pop up
Posted on July 11, 2012 3:46AM by hollowfication
you should add more zombies its a great mod but i only see about 3-4 zombies per minute :S
Posted on July 13, 2012 3:24AM by jordo85
i can't get it to work. I am on
Posted on July 16, 2012 6:35PM by GangstaChamp21
oh dont worry about my last comment, its all good just try to improve on stability (less game crashing :S)
Posted on July 25, 2012 6:19AM by jordo85
This is awesome! 10/10

I added a Preview Video for anyone interested.
Posted on July 27, 2012 7:25AM by BossInvader
Awesome mod

10/10 !!
Posted on August 8, 2012 9:37AM by OviaZ
this mod is sick 10/10
Posted on September 2, 2012 6:32AM by Lapunzada
10/10 but is it possible to make it so when your infection level goes to 100% you turn into a zombie rather than start to just die and re spawn. I think that would be sick. Also have you tried combining elements with your Left 4 Liberty mod?
Posted on September 9, 2012 8:19PM by Grif863
Hey did you stopped working on the mod?
Posted on September 26, 2012 11:36PM by angeloflife17

I am releasing a small update here tonight actually...

@Grif 863

sorry for late reply. I've tried the zombie niko thing, doesn't work out so well with getting him "unzombiefied". I can make you loose control of him and he'll do what every other npc does, but it's kind of lame after the first couple of times.

The left 4 liberty elements are left seperate due to difference in coding needed because of the way responds to different "relationships", or i should actually say doesn't. That's why the are just different and not complete birds of a feather.
Posted on October 3, 2012 10:52PM by motorsport71
Oh okay nice. Also I'm glad this is compatible with EFLC and steam. In fact I really love all the bases and stuff you put in here. But do you think Left 4 Liberty will ever be compatible with steam or is it more complicated than that cause I know this stuff can be very tricky.
Posted on November 1, 2012 12:56AM by Grif863



Posted on December 8, 2012 11:39AM by motorsport71
I can't get it to work.
Posted on February 6, 2013 3:50PM by Rekozz
everytime i start up this mod my game crashes, yout left 4 liberty mod was a lot smoother than this one, though this one is cooler but you need to fix that whole crashing thing.
Posted on March 29, 2013 2:27PM by mcblackpanda
is it for pc only
Posted on April 27, 2013 11:50PM by jsant40
everything on this website is pc only
Posted on May 1, 2013 9:13PM by Venexion
The mod activates and deactivates itself.
Posted on June 16, 2013 8:56AM by ShenLong Kazama
10/10 thanks man!! this is awesome!
Posted on July 20, 2013 9:11AM by nba941422
10/10 thanks man!! this is awesome!
Posted on July 28, 2013 2:41PM by SLENDER_SOT2
Great mod , one of my fav!
Posted on July 29, 2013 2:31PM by SLENDER_SOT2
one of the better gta 4 zombie scripts out there, thanks
Posted on August 10, 2013 10:17PM by beaverfeaver12
Is there a difference between this and your Left 4 Liberty Script?
Posted on November 19, 2013 2:00AM by -NocTurN-
Please can someone tell me how to mod the zombie health and make them run?
Posted on November 24, 2013 4:32PM by Salgier
In the next version could you add emergency vehicles that spawn with their sirens turned on apart from the ambulance? Anyway 10/10 for this!
Posted on December 23, 2013 9:48AM by Mafiya
Is there a way to turn off all the fire and explosions?
Posted on February 17, 2014 2:04PM by Jayjacker
It disabled Police being able to attack me?

Anyone else have the same problem?

( Police wont attack when mod is enabled and disabled )

Posted on March 8, 2014 5:08AM by JellyPop
this have some survivers
Posted on May 8, 2014 2:44PM by thomasKiller15
where does the vb file go? #noobmodder
Posted on August 9, 2014 3:28PM by Coltman1
mine is 1.0.3 but when i press nothing happens

when i read the scripthookdonet.txt

it says errors in loading lines

like line 88 error ped is not at gtaped
Posted on December 28, 2014 10:27PM by chitiger
Hey having trouble installing this into eflc idk where it goes :0 #stillanoobmodder
Posted on March 7, 2015 9:54PM by Coltman1
Hey, i have a problem... how do i get rid of infection coz when i get close to the ambulance i can't do anything... there's no hint showin up for what i got to press or anything like that... please help.
Posted on October 21, 2015 11:33PM by Untamed Savage
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