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MW3 Downgrade and Update Prevention Guide

Scheduled Pinned Locked Moved MW3 Client Support
16 Posts 12 Posters 1.7k Views 3 Watching
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  • espresso8031 Offline
    espresso8031 Offline
    espresso8031
    wrote last edited by
    #5

    If anybody runs into some script errors in private mp matches like I did, using different manifests solved it for me

    download_depot 42680 42682 2661317971072643596 
    download_depot 42680 42683 1595601894688570808 
    download_depot 42680 42681 5651167211650965131 
    download_depot 42690 42691 4104640605720756125 
    

    please remember to clear your plutonium iw5 cache.

    All credit goes to discord users Fry and Raine! Hope this helps someone.

    SkUlLcRaCkErgd 5persondude 2 Replies Last reply
    3
    • blitzou Offline
      blitzou Offline
      blitzou
      wrote last edited by blitzou
      #6

      Life saver as well! Thanks for the detailed tutorial. Now facing the same problem like this ticket to launch on a private game : https://forum.plutonium.pw/topic/46474/anyone-able-to-assist-please

      Vipadus 1 Reply Last reply
      1
      • candy2 Offline
        candy2 Offline
        candy2
        wrote last edited by
        #7
        This post is deleted!
        1 Reply Last reply
        0
        • blitzou blitzou referenced this topic
        • blitzou blitzou

          Life saver as well! Thanks for the detailed tutorial. Now facing the same problem like this ticket to launch on a private game : https://forum.plutonium.pw/topic/46474/anyone-able-to-assist-please

          Vipadus Offline
          Vipadus Offline
          Vipadus
          wrote last edited by
          #8

          blitzou Check the post by espresso8031 right above yours. I had the exact same error and all I did was uninstall MW3 and Plutonium, then redid the downgrade process except with those depot files.

          1 Reply Last reply
          0
          • Grubs.gg Grubs.gg referenced this topic
          • Benson774 Offline
            Benson774 Offline
            Benson774
            wrote last edited by
            #9

            was able to download the first two but not the third (42751)
            Screenshot 2026-09-10 160637.png

            1 Reply Last reply
            0
            • Benson774 Offline
              Benson774 Offline
              Benson774
              wrote last edited by
              #10

              update: Grok made me swap 42751 with 42750 and apparently it worked. then i followed the rest of the procedure and now i can play MW3 (it wouldn't run before the downgrade)
              Screenshot 2026-09-10 162223.png

              1 Reply Last reply
              0
              • espresso8031 espresso8031

                If anybody runs into some script errors in private mp matches like I did, using different manifests solved it for me

                download_depot 42680 42682 2661317971072643596 
                download_depot 42680 42683 1595601894688570808 
                download_depot 42680 42681 5651167211650965131 
                download_depot 42690 42691 4104640605720756125 
                

                please remember to clear your plutonium iw5 cache.

                All credit goes to discord users Fry and Raine! Hope this helps someone.

                SkUlLcRaCkErgd Offline
                SkUlLcRaCkErgd Offline
                SkUlLcRaCkErgd
                wrote last edited by
                #11

                espresso8031 do I install these with the ones above or just the four in your comment?

                1 Reply Last reply
                0
                • 5persondude Offline
                  5persondude Offline
                  5persondude
                  wrote last edited by
                  #12
                  This post is deleted!
                  1 Reply Last reply
                  0
                  • espresso8031 espresso8031

                    If anybody runs into some script errors in private mp matches like I did, using different manifests solved it for me

                    download_depot 42680 42682 2661317971072643596 
                    download_depot 42680 42683 1595601894688570808 
                    download_depot 42680 42681 5651167211650965131 
                    download_depot 42690 42691 4104640605720756125 
                    

                    please remember to clear your plutonium iw5 cache.

                    All credit goes to discord users Fry and Raine! Hope this helps someone.

                    5persondude Offline
                    5persondude Offline
                    5persondude
                    wrote last edited by
                    #13

                    espresso8031 Here are the DLCs for people that own them:

                    DLC1: download_depot 42690 42695 9005316271397236436
                    DLC2: download_depot 42690 42696 2478272765185873756
                    DLC3: download_depot 42690 42697 5810618727794750362
                    DLC4: download_depot 42690 42698 5997898371746217629
                    
                    1 Reply Last reply
                    0
                    • DirkRockface DirkRockface referenced this topic
                    • DigitalRifle Offline
                      DigitalRifle Offline
                      DigitalRifle
                      wrote last edited by DigitalRifle
                      #14
                      This post is deleted!
                      1 Reply Last reply
                      0
                      • DigitalRifle Offline
                        DigitalRifle Offline
                        DigitalRifle
                        wrote last edited by
                        #15
                        This post is deleted!
                        1 Reply Last reply
                        0
                        • KanonAlfa Offline
                          KanonAlfa Offline
                          KanonAlfa
                          wrote last edited by
                          #16

                          Yes it works, I can already play multiplayer on Plutonium, but the base game on Steam no longer opens; the campaign and the other game modes don't work anymore. Is there a solution for that, or are they going to make Plutonium compatible with the new update so everything works fine?

                          1 Reply Last reply
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