Cheat Engine

[squall0833]

I know this may sound stupid, why would anyone makes double damage taken, lol, I'm trying to understand something and to do some experiment,
english is not my first language, hopefully you all understand what I'm trying to say,

lets say, what I found

what writes to health:
mov [edx],eax

and the memory viewer shows what before that line:

mov eax,[ebp-10] (registering new health value)
mov [edx],eax (writes new health value to the address)

if the value of ebp-10 is the new health after damage taken,
in this case, is it possible to write code that "doubles the damage taken" to the new health value ([ebp-10])?
(I don't think it's possible in this case)


is it only possible if the instruction is telling eax the amount of damage and subtract to [edx]?
i.e
mov eax,[ebp-10] (let's say if ebp-10 is the amount of damage)
sub [edx],eax

can I change eax by multiply its existing value?
if [ebp-10] value is 20 (20 damage), and [edx] is health 100
mov eax,[ebp-10] register 20 to eax,
I want to make this eax become double, by multiple it with x2 so it will become eax = 40
then finally sub [edx],eax which is health 100 - 40 = 80

is it possible to do something like this?


So I can do something like, buy a $100 item in game, but it will cost me $200, buy $500 item, cost me $1000.

I would greatly appreciate if you can help, thanks

[Zanzer]

[squall0833]

[Zanzer]

[squall0833]

[Zanzer]

The pushes/pops are used to save whatever value is currently in those registers, since later code probably needs them.
The XOR is used to simply zero out EDX, as it is used within the multiplication.

[squall0833]

[Zanzer]

Think I screwed up the previous code. I don't multiply much.

[squall0833]

Thank you for the explanation, I'll try it on that fps game later,

currently I'm trying to hack the building time for red alert 3 and god mode for units, still no clue how to do that yet