Cheat Engine

[Matthew]

Hey guys,

So I started out cheat engine very recently and tried to make a simple bot for a game called knights and merchants remake (KAM remake).
It is a strategy game where you have to collect rock and gold etc... build town and army.
Today I decided to do this little project and try and cheat the rock values, at first I tried out simply finding one value and changing it but that just started sending some files to the game developers ( as error with cause and some extra info) and kept freezing the game, So I thought that the address I found was probably not connected to the rock directly, perhaps it was encrypted?

So I did a byte search and did some change/unchanged values search and got 3 end addresses, 2 of them having the exact value of the rock.

Now keep in mind that I am a complete beginner and have little knowledge of cheat engine.

What I did next was find out what accesses those 2 addresses and here is what I found:



Now looking by what accesses it , Now I might be wrong, looks like some sort of a formula, can somebody give me leads ? where to look next?

thank you in advance!

[Dark Byte]

Change both address to something completely different (like 16 and 64)
Now lose one rock
You will see which of the two was the correct one.

If it had no effect, you have to find another address
If it crashes, try changing both, or again, a different value type (perhaps binary)

Only when it has effect you can start using the debugger to find what accesses it.

Also, look at the memory in the hexviewer, it might give a clearer view of what you are editing


Anyhow, if you look at the assembler code, look at it in the disassembler. Two completely separate lines don't really say much. (Except that it is an element inside an array)

[Matthew]

[Dark Byte]

You will have to do a code injection and try to understand how the game stores the values

It then depends on the instruction etc...

The instructions you've shown are used to modify all elements inside the array (sticks/rock/wood/etc...)


If it was the *338 one, the memory block exists out of a 4 byte header followed by the number of resources for each field, filled in as a 4 byte value

If it was the *46a one, the memory block exists out of a 78 (0x4e) byte long header followed by the number of resources for each field, filled in as a 2 byte value

Depending on how which is the actual one and which is display only you have to decide how to code it.

For example, if you only wish to affect rock (I'll assume that edx or eax=1, check in more info yourself):

[Matthew]

I filled in what I could (I am a complete begginer and having read the tutorials about Auto assembler this is my limit)

I am wondering if you could feel in the blanks or give me hints? I left out 3 blank lines, didnt know what to put in there, any suggestions?

[Matthew]

Ok, ive tried injecting a simple jump to exit code that does not read the subtract, Ive also tried to add 2 when rock is being brought in so instead of + 1 rock it will give me +3, but it only works for around 2 minutes and then crashes, and sometimes crashes even quicker, Most likely due to my shity coding skills

I need help please!!!

These are the steps that I took:
1: byte search with inc+dicr value to find the rock value address and display value address



2:I viewed in dissasembler and injected a simple jmp code to avoid rock being deducted but that only worked for couple seconds and followed by a game crash!

[Dark Byte]

5a7343 does a jump based on the result of the previous sub
instead of just jmp exit turn it into sub dword ptr [ecx+edx*4+04],0


Also, this code is used by other stuff as well (not only for rock), so if it is used to change your characters in the negative direction of the x axis you won't be able to move left

[Matthew]

[Matthew]

Hey Guys,

I did some more research, I used a default cheat that is already in the game that adds everything by 10.
I found the value of stone and looked at what writes it and I found the function that adds 10 to all the values

[DaSpamer]

I'd love to learn little bit more,
Hope you'll help us Dark Byte...

[poppi]

Hey, I am also a player of this game. Specially in Multiplayer. Also i have tried some things. I had it one time for singleplayer without problems,so i had over 500 wood. However i tried it some days ago a 2nd time and this crashes comes. I remember sth,that i have used hex, but it doesnt work this time too


Have someone an idea or can help. A trainer would be great HAHA However multiplayer will be really hard. I have looked how the server works on this game. It is completly crazy,i can tell more about if "normal" singleplayer will work without problems


EDIT: Or would it help maybe,if i would add a picture of the error which should be sended to the developers? HAHA
Thx guys

poppi

[lewin]

Hey guys,
I'm one of the developer of the KaM Remake, I happened to find this post when I was Googling for sites talking about our project, so I thought I might reply

Firstly let me say that I am very much against multiplayer cheating in order to gain an advantage over other players (cheating in singleplayer is your choice, in fact we encourage that by including singleplayer cheats and debugging options). Winning in multiplayer through cheating seems completely unsatisfactory (how can you feel good about winning when you only won because you cheated?) and just annoys other players. However, the fact that people are trying to cheat means that we have gained a reasonable level of popularity. I appreciate that you discuss it publicly so if you did expose any exploits, we would have an opportunity to patch them.

I regret to inform you that our multiplayer system is very cheat resistant (which is a good thing in open source projects like this). Each client simulates the ENTIRE game starting from the same random seed, and the only traffic that is sent over the network and synchronised between players are specific commands such as "build house" or "move this soldier". These commands are thoroughly checked by every client to ensure that you are not doing something illegal (such as moving an enemy soldier), and if you are, the commands are ignored by other players. So cheating through the network protocol is not possible because other clients will reject your illegal commands.

Also, because every client simulates the entire game, any memory hacks you use will ONLY affect your simulation of the game, not the other player's simulation. This means that when you try to use the resources (e.g. stone) that you gained through cheating, the other client will not have those resources and you will both become out of sync. This is quickly detected and your game crashes with an "out of sync" error. Even if you suppressed this error, there's not much point cheating when none of the other players are affected by your cheats, right?

So a hack to give you extra resources like you discussed above would work if you play by yourself or in singleplayer, but as soon as you play with another player (who is not using your hacks) you will get a crash because your game will go out of sync.

As to why your hack is crashing for you after a few minutes in solo multiplayer/singleplayer, adding a resource is a complicated internal process, it needs to be updated in many places (deliveries, storehouse, player statistics, etc.) If just one of these places is not updated correctly, it will probably crash after some time. So it's not a simple process to create a hack like this, but it's not due to encryption as you suggested in your original post, it's just due to complicated internal game structure. Also, you're on the wrong track with the "mad" stuff, that's our debugger/crash reporter madExcept

So I'm sorry to disappoint you, but cheating in multiplayer in the KaM Remake is very difficult. If you would like to improve your skill (and so beat other player legitimately) I can recommend these Youtube videos of competitive multiplayer games:
youtube DOT com/user/Leeuwgie
And also feel free to ask for suggestions for how to improve your strategies on our forum:
knightsandmerchants DOT net/forum/

I hope this helps.
Cheers,
Lewin.

[DaSpamer]

[lewin]

I assumed these cheats were aimed for multiplayer since singleplayer cheating is mostly redundant given that we have singleplayer cheats implemented into the game (as most games do). I guess he might have wanted something a bit specific. We'd be happy to implement more singleplayer cheats to save you the trouble, please send us your suggestions with the reasons why you think they are needed (to our forum linked in my previous post is preferable).

The forum was offline for a few hours yesterday, try it now.

[++METHOS]

lewin-

Discussion of multiplayer cheating is not allowed here. Usually, this rule is enforced quite adamantly, even by non-moderator members. In the rare case that it is not, it is usually due to a simple oversight. Most newer members do not bother with reading any of the rules prior to posting, unfortunately. As such, when game titles aren't mentioned, or when responders do not go out of their way to first determine if the game in question is an online/multiplayer game, accidents like this one are likely to happen. Needless to say, it doesn't happen often, and when it does, it is ultimately at the discretion of the moderators to decide whether or not to lock the thread. Since the title of this game has been published, and the OP appears to be running the multiplayer version of the game, it is technically in breach of the rules. However, given the fact that this executable is a freeware, open-source project, some might argue that the rules should not fully apply in this case. I don't know. Personally, I am against multiplayer cheating unless I am the one doing it.