Downgrade Call of Duty 1.5 to 1.1

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Created 5 years ago

Downgrade Call of Duty 1.5 to 1.1

How to downgrade CoD version 1.5 to version 1.1

What is this tutorial about?

This tutorial is made for people who got a newer version of Call of Duty installed but want to go back to CoD 1.1
You may need this if you got CoD1 from Steam or any other digital download plattform or if you bought one of the latest retail versions. I will explain how you can downgrade your version of CoD (1.2/1.3/1.4/1.5) to the vanilla version 1.1 and optionally how to keep both versions on your PC.

Downgrading to 1.1

First you need to locate your current Call of Duty installation folder.
If you want to keep your current version and have 1.1 in addition you need to make a copy of your current CoD folder and rename it to Call of Duty 1.x (replace x with your version).
Now we will downgrade the other Call of Duty folder.

Delete the following files from your main folder:
Depending on your version there won't be all these files and the localized files may have another name depening on the language of your CoD
  • pak8.pk3
  • pak9.pk3
  • paka.pk3
  • pakb.pk3
  • localized_english_pak2.pk3
  • localized_english_pak3.pk3
  • localized_english_pak5.pk3
As the last step you need to replace the gamefiles with the original 1.1 ones
Download the 1.1 gamefiles from here: CoD 1.1 Gamefiles
Replace the CoDMP.exe with the one from the download and move the .dll files into the main folder.

Tutorial Details

Created: 5 years ago by ^THiNK#Jona

Views: 19043 Views

Keywords: Downgrade call of duty, downgrade, version 1.1, call of duty 1.1, call of duty 1.5, cod 1.1, patch,

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All the things that the tutorial says are correct, but something is missing and it needs to be added. Pak0.pk3 on cod1.1 is somehow different from the on exists in 1.5 version of it. I can create a patch (a file that will be about 4mb max and it will downgrade this from 1.5 to 1.1, but I dont have both versions on my PC so I can't do it, at least not on mine).
Commented by -]Fearless[-Iremos  (Aug 25th, 2014 12:24 AM)

hi I have problem: "Invalid pk3 referenced" can you help me please?
Commented by eternal-sound  (Nov 12th, 2014 10:52 AM)

^ remove mods from your main folder
Commented by themegabyte.  (Nov 12th, 2014 07:52 PM)

Hey so I've done all of this, but it'll say CoDMP.exe has stopped working and will crash...what am I doing wrong? Also I made the mistake by buying this game on Steam and no servers on 1.5 load - is 1.5 even still alive since almost everything on this website is all about 1.1?
Commented by Snipes  (Feb 04th, 2015 10:08 AM)

1. You might have some packs or files in your folder that could make some troubles. Delete or put them in another place and try again.

2. The serverlist is currently not available. It might take a few days until it shows up again.
Commented by ^THiNK#stOned  (Feb 04th, 2015 11:09 AM)

How do I know which packs or files to delete or move? I've retried this whole downgrading process again and I still can't get it, cod won't even open for me it just crashes and when I just re download it from Steam it's automatically updated to v1.5
Commented by Snipes  (Feb 05th, 2015 01:50 AM)

If anybody is interested here are some rare downgrade patches for CoD1.2, 1.3 and 1.4:

Commented by Progrezz.  (Dec 10th, 2015 03:27 PM)

i'D JUST GO FOR downloading cod1 and using same key lmao
Commented by Jump*it.hehu**  (Feb 20th, 2016 09:03 PM)

What is the difference with 1.4 and 1.5 in the main ?
Commented by Melvyn  (Aug 28th, 2016 10:08 AM)

It all worked, but it says i need a cd key before i can play the game
Commented by icecreem  (Sep 06th, 2017 09:24 PM)

I'll send you a private message with one of mine. :)
Commented by eQuinox Emy  (Sep 06th, 2017 09:28 PM)

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Commented by ElvaMds  (Nov 03rd, 2017 05:32 PM)

if anyones having trouble with their game not working after downgrading to 1.1 try this Safedisc DRM fix that worked for me. for some reason 1.5 was working but when i would downgrade to 1.1 my game wouldn't start it would just display the cod logo for a second then just crash with no error msg. apparently some security update in 2015 made games with safedisc DRM pretty much unplayable.
Commented by [NVE*SP]{KEA}  (Oct 06th, 2018 07:23 PM)

I have done all this but i just get an error message 'CODMP.EXE HAS STOPPED WORKING'.

Tried it again using the tutorial and still same error.. bought from steam and using Windows10
Commented by ^hC|Hamii  (Oct 24th, 2018 08:46 PM)

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