Left 4 Dead 2

Left 4 Dead 2

Mutation: Un-Immune (Now With Versus!)
78 Comments
Bobinsox Sep 30, 2024 @ 7:56pm 
Xanaguy uploaded an updated version in 2019 since this one died a decade ago.
miotojptx Oct 19, 2022 @ 5:41pm 
This mod doesn't work anymore. Probably the TLS update.
John27 Aug 25, 2021 @ 1:59pm 
there is a similar newer "vaccine" mutator, idk if taken or not
Zelda Merda Oct 21, 2020 @ 7:32pm 
Players don't get "infected" after dying and getting rescued in a closet. Infection only works in the first life of the player
Goth Catboi :3 Feb 4, 2020 @ 9:27am 
Lovely
Xanaguy Jun 25, 2019 @ 12:15am 
It would appear as though the author is no longer supporting this mutation, regardless, I have finally gotten around to uploading a fixed version of this mutation. Enjoy.
Lemon Fizz Jan 30, 2019 @ 4:07pm 
pro tip this mutation is fun BUT everything infects you yes EVERYTHING fire,spitter goo karma chargers charging & friendly fire you name it even adrenaline shots if you use it un-infected. PS if a bot dies they'll respawn in saferoom and instantly die and turn into a special infected and instant "survivors were overwhelmed" PPS jockeys are safe except their melee attack
Victorious the stylin red Dragon Jan 6, 2019 @ 5:05am 
do not play this with bots. cause that might cause you to lose right on
Xanaguy Sep 5, 2018 @ 1:32pm 
Unimmune Versus does NOT have a .nut file, making that "mutation" 100% Normal gameplay. I am currently coming up with a fix and solo versions. With your permission, I would like to upload this as a separate addon.
SarahTheWolf Jul 10, 2018 @ 7:34am 
This + Dead Rising Mods = FUN!
You earned a BIG THUMBS UP!
Dyl-Pickle Jan 14, 2018 @ 4:19pm 
How do you play this? I cant find it in mutation.
staryoshi06 Sep 21, 2017 @ 3:00am 
Is it possible to find a way to make this work on L4D1 maps? I assume it's something to do with having different survivors.
Pegasis-Vera (She/They) Jul 22, 2017 @ 8:48am 
Would you mind if I use the source code to this for a mod I'm making and give you credit for the stuff I don't edit? I've been trying to make something like this but no amount of tutorials has been able to teach me how to do it...
NOPE228 Feb 4, 2017 @ 11:50pm 
Dear developers, please can you make this mutation for survival mode, it would be great!
Dracullina Oct 2, 2016 @ 12:07pm 
This is awesome, but my teammates don't turn when killed. Is there a known reason for this?
Athena Jul 31, 2016 @ 8:14pm 
Is there a Un-immune without verses?
Zz_THEGREATZ_Zz1 Jul 25, 2016 @ 11:02am 
oh no ive been shot its okay tho it only takes a little bit of dama-wait why am i infected?
Buddershroom Jun 25, 2016 @ 7:23pm 
it seems like anything you can get damaged by "infects" you like gunfire, explosions, fire, falling
i find it weird
RESCUE 7 May 28, 2016 @ 6:10pm 
Valve should of added this...
Chem Dog Feb 20, 2016 @ 10:06am 
I've been looking for a mod like this for ssooo long. Thanks
Amber Dec 24, 2015 @ 5:38pm 
I love this mod :3 when I heard that you turned I was hoping you actually got to control your infected but its that moment that No adrenaline shots left someones bit (from previous level) and your all just sitting in the saferoom then ur buddy a minute or 2 later OUT OF THE BLUE just turns into a tank its like AH! or as Bill would say Holy Mother of God,I just love waiting for my ally to turn as im pointing a shotgun to their head ready to blow it clean off
Domenikus Dec 17, 2015 @ 7:29pm 
Why does fire infect you?
Zedalch Dec 1, 2015 @ 8:51pm 
This is awesome due the No More Room in Hell and Killing Floor 2 and 1 atmosphere.
CodeKiller Aug 17, 2015 @ 10:04pm 
@HYDRA956

to me a nerd is just being smart in general
CodeKiller Aug 17, 2015 @ 9:39am 
idk
RyeSparrow  [author] Aug 17, 2015 @ 9:20am 
@Ancestor Doge

But nerds are good, why are you ashamed of it?
CodeKiller Aug 17, 2015 @ 12:45am 
well, technically the survivors aren't immune they are infected but resistent to the zombification and special infected mutations.

I'm such a god damn nerd
Un Coche Corto Nov 29, 2014 @ 8:44am 
with it only working on l4d2 maps doesnt that mean the old survivors are the only people who are the only immune humans with the escape guys also being immune?.......somehow
Bluebirdo Oct 31, 2014 @ 7:25pm 
Interesting mutation, it's a shame you can't control the special you become, but still cool.
KJ Oct 25, 2014 @ 12:27pm 
holy shit, now this game is 5x more realistic coz before they only just weakly scratched ya
RotundGopher89 Oct 2, 2014 @ 10:17am 
T5his is so much like a real Zombapoclypse guys DONT GET BIT VVV
RyeSparrow  [author] Aug 4, 2014 @ 8:49am 
@[CTT] Ater (GlaZe)
The infection system iss randomized, you can turn into a Tank, Witch, Spitter, Hunter, Ect
its always randomized
Sleep Token <3 Aug 4, 2014 @ 5:41am 
if a player dies is it possible that he turns to a witch ?
Survivor Jul 31, 2014 @ 3:38pm 
i very much shrekt him
RyeSparrow  [author] Jul 31, 2014 @ 3:22pm 
@Zeplija
Okay, i payed for it, heres your double-quarter pounder with a 20 piece mc-nugget and bbq sauce, and your coke too *hands it to ya*
RyeSparrow  [author] Jul 31, 2014 @ 3:20pm 
@slenderbender

I lost ;~:
I got shrekted
Survivor Jul 31, 2014 @ 3:08pm 
rock paper sissors shoot
RyeSparrow  [author] Jul 31, 2014 @ 12:12pm 
@slenderbender

Hmm....Rock Paper Scissors?
Survivor Jul 31, 2014 @ 12:09pm 
whos gonna buy this one?
RyeSparrow  [author] Jul 31, 2014 @ 8:54am 
@Oh, you've redecorated!
Okay
Zeplija Jul 30, 2014 @ 9:43pm 
While the subject still stands, may I have a double-quarter pounder with a 20 peice mc-nugget and bbq sauce? Oh, and a coke, too.
Please.
RyeSparrow  [author] Jul 27, 2014 @ 10:38am 
Thought it was another troll
RyeSparrow  [author] Jul 27, 2014 @ 10:38am 
Oops, sorry, i accidently deleted a comment that was asking for someone to play on Multiplayer, ill come play with ya sometime if you wanna play Versus/Campaign mode
Survivor Jul 9, 2014 @ 4:04pm 
ok. ill post it in the bugs

RyeSparrow  [author] Jul 9, 2014 @ 7:23am 
@UTBslenderbender

that..wasnt supposed to happen
Survivor Jul 9, 2014 @ 12:34am 
i did double check. when you get to a safe house and a person died, when it starts up, it insta kills all dead people then it leaves up to 3 special infected in the safe room
Survivor Jul 8, 2014 @ 9:58pm 
ok seeya. but really. pain pills would be nice. but you dont have to. just my idea.
RyeSparrow  [author] Jul 8, 2014 @ 9:57pm 
ok, ima go get me some Large Fries
Survivor Jul 8, 2014 @ 9:56pm 
im gonna go and not get bitten. i dont have time for mcdonalds. he turned into a zombie too, probably.
Survivor Jul 8, 2014 @ 9:51pm 
errr a 20 peice nuggets, large fry, large coke, and no ketchup.