(adsbygoogle = window.adsbygoogle || []).push({}); When I looked at this board and various other sites for the release of Campaign / Spec-Ops hacks for MW2, I've found out that there's none, only the 360 version exists.
So, I've begun my journey on trying to get it working for the PS3 version. And in the end, I've finally got it working... damn that took me a while to understand exactly how everything work.

I have successfully re-summed SAVEGAME.SVG and loaded da shit up in the game without any problem.

I'm not going to release the full working hack any time soon, but I'll release the half working hack for now (the download link is below) since the DVARs are already in public domain.

This half-working hack includes infinite health, super jump and speed and infinite ammo (just like what the 360 version includes) :

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I'll try to make this short, ok, here goes.

Try to load the save in MW2, and you'll get this error:



MW2 save is checksummed, just like other games' saves. If there's no copy protection on them, they are likely to be checksummed.

When you save data in-game, PS3 takes every single byte of a save data (e.g. SAVEGAME.SVG) and re-generate a checksum. So, if you change something inside SAVEGAME.SVG and try to load it in-game, PS3 will compare this editted SAVEGAME.SVG and the checksum value. If this SAVEGAME.SVG and the checksum value are not the same, you'll get a 'bad checksum' error. Understand?

Here's more information about checksum:
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Good thing is that the checksum is stored inside SAVEGAME.SVG, not inside the PS3 system!

All you need to do is to locate this checksum in SAVEGAME.SVG and update it. In other words, you need to identify how SAVEGAME.SVG is checksummed and then you need to know what data is covered by that function before you can do anything about it.

I'll give you a few hints regarding the checksum:

- Get a lot of SAVES that are almost the same (same mission, same checkpoint but different difficulty) and compare to each other in any hex editor program.

See which bits always change and see which bits don't change. There's a good chance that the bits that always change are the checksum.

- To update the checksum value, you must generate a new checksum and replace that with the old checksum value somewhere inside the save ...

- If you think you have found where the checksum is, you must ignore that bit and then generate a new checksum based on everything else (data), anything that's not part of the checksum.

- If you see 4 bytes (8 digits) that always change, it's likely not to be MD5 or something similar. If you didn't know, a MD5 hash has 32 digits.

So, if you generate a checksum that happens to be the same as the checksum inside SAVEGAME.SVG (un-hacked), you're set!!

If you have never done this before. I suggest following these tuts, it will make you understand the whole thing easier:

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And

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If you have followed these tuts and got the matched results, then fixing MW2's checksum will be easy.

Anyway, if you have managed to re-sign the save correctly, you can get more hacks. The full list of DVARs is available:

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Just add desired DVARs with thier values (e.g. ..200B0..) under compress_$mapname inside the save and you're set.

Enjoy and good luck.

Lets get this over with now guys. BooJak, Just take a pic of your self on Solo Doing a Superjump and Post it so they all can Shut up already and stop Complaining. I DONT think BooJak is Lieing im pretty sher all this info is Indeed true. BooJak ill add you and ill record you or just take a pic of you doing the Hack's. You dont need to give me them or anything ill just record you and post it to show al these people That you have the Hack's.

i dont have a clue wat any1 is saying here, summin about hex editer & codes n shit. y arnt the hacks like cod4 where u put ur game save on a usb onto ur comp & put all the code crap onto ur files ?

no its not like that... there is now checksum's in the GAMESAVE's and when you put the DVARs in it and set it in the ps3 it will say bad checksum... it will say bad checksum because when you add the DVARs you change the file size and when you change the file size then you change the checksum too...(i think its like that)

so from the other thread you linked us to, the people are saying that it might not be the whole file that is being checksummed? is this true... as from what you have said it isnt but then you told us to look at that thread as its helpful

Sorry, haven't had time to read this fully..

Does this actually work, and is it worth doing? Means I can finish Veteran mode in like another 2 hours xD Would be stupidly helpful..

Look guys, i have tried all of this. I can generate my own checksum, i've added loads of dvars to the file but the problem is, most of them are protected. The ammo one is player_sustainAmmBo. The B means that is is pretected and tamper proof. The default value will therefore be on the disc not in the savegame file. But saying this, i have managed to make veteran have the same ammount of health as recruit/regual, but the enemies are still deadly accurate. All that is needed is some dvars that are not protected...

so how have they managed it for the xbox... are they not protected on the xbox ?

all of the useful DVARS have C infront of them in the list... meaning they are cheat protected... this is really annoying lol as now i have the checksum thing, i cant actualy give myself super jump etc.

xbox has resigners which you can edit almost any file, even on disk, and resign it to work.

oh, so there isnt much chance of this working on PS3 then