My IDA_Python Scripts for Analyzing Unreal Engine Games and Generating Cheat Code

[Eiffel2018]

uEngine.py is used to analyze the unreal engine games,

Usage:
1. Open the NSO/elf files and wait until it shows IDLE at the status bar


2. Extract all the files in the same folder.
Press ALT+F7 in IDA PRO and choose uEngine.py


3. Wait until the script stop. (about 1 hour)
Some information and sample code will be shown


4. For further study, we can use SDK('UClassName'), such as SDK('UWorld') , SDK('UGameInstance') etc


5. To examine the contents of UObjects, we need another IDA instance to connect GDBstub
then ALT+F7 the uEngine.py there.

Copy the pointers strings at there,
e.g. jumpto(ptr((0x8AF4F18, 0x170, 0))) , it stands for [[main+8AF4F18]+170]+0, it will jump to an instance of UGameInstance

6. If you searched an address of some memory. you may want to know what UClass it is.
First, you need to find out the offset of an UObject by the ASM codes with breakpoint.
Then, you can jump to the offset 0 of this UObject and press O,
The offset 0 always points to an address of MAIN, it is the Assets (Function Lists) of that UObject,
then you can copy that address, and check the address at the IDA instance of NSO/ELF

for here, it is an UObject calls UMeshDescriptionBase

and you can SDK('UMeshDescriptionBase') to study what the offsets stands for and what functions it contains



======================================================================================

CheatGen.py is a template for developing cheat codes with instructions and hints

Example usage can be found in various game cheat posts. Such as
https://gbatemp.net/threads/neverawake-tid-0100da30189ca000.625158/
https://gbatemp.net/threads/river-city-girls-2-01002e80168f4000.622566/
https://gbatemp.net/threads/megaton-musashi-x-cross-megaton-musashix-kurosu-0100571018a70000.623399/
https://gbatemp.net/threads/fire-emblem-engage-0100a6301214e000.624800/
https://gbatemp.net/threads/octopath-traveler-ii-prologue.626041/
https://gbatemp.net/threads/theatrhythm-final-bar-line-010024201834a000-010081b01777c000.626223/
https://gbatemp.net/threads/xenoblade-chronicles-3-010074f013262000.615986/

 

[kindren]

Hio @Eiffel2018, if I want to use it for unity, do I also use uEngine.py? Or there is a unity version?

Thank you.

 

[Eiffel2018]

Hio @Eiffel2018, if I want to use it for unity, do I also use uEngine.py? Or there is a unity version?

Thank you.

No and don't need to do so,
only the Unreal Engine Games can use this script.

For Unity Games, it is very easy to decrypt the function names by il2cppdumper_gui

Luckily, I can use the codegen.py to develop cheat codes, for all kind of games.

 

[kindren]

No and don't need to do so,
only the Unreal Engine Games can use this script.

For Unity Games, it is very easy to decrypt the function names by il2cppdumper_gui

Luckily, I can use the codegen.py to develop cheat codes, for all kind of games.

Is codegen.py the same as CheatGen.py?

 

[Eiffel2018]

Is codegen.py the same as CheatGen.py?

may be that codegen.py was an older version of cheatgen.py

 

[StevensND]

D:\ExeFS\uEngine.py: 'NoneType' object has no attribute 'start_ea'
Traceback (most recent call last):
File "D:\Program Files\IDA 7.7\python\3\ida_idaapi.py", line 580, in IDAPython_ExecScript
exec(code, g)
File "D:/ExeFS/uEngine.py", line 1352, in <module>
elfSegment()
File "D:/ExeFS/uEngine.py", line 839, in elfSegment
ida_segment.set_segm_name(ida_segment.get_next_seg(ida_segment.get_segm_by_name('.got.plt').start_ea),'.got',0)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
AttributeError: 'NoneType' object has no attribute 'start_ea'

Any fix?

 

[Tekman17031979]

Hello. I opened the main file of river city girls 2 + update 1.0.2 to test. I have this message when I want to start the script. Can you help me?
Sorry for my english i'm french.
I use ida pro 7.6 sp1 & python 3.9.0

 

[lapistier]

I'm also getting the same error message, using Python 2.7 and nxo64.

 

[pspmaster]

Hello. I opened the main file of river city girls 2 + update 1.0.2 to test. I have this message when I want to start the script. Can you help me?
Sorry for my english i'm french.
I use ida pro 7.6 sp1 & python 3.9.0

To avoid the error, You should put the all files in the CheatLib.7z file in this IDA folder：refer to the following picture: i installed IDA7.6 Pro at D:\Tools\IDA
PS. I installed Python3.9.12 here D:\Tools\IDA\Python39,
you should COPY the python3.dll and python39.dll from the installed folder D:\Tools\IDA\Python39 TO the IDA root folder(refer to the picture config_python39.jpg. that's all. now you can press ALT F7 in IDA to run the Cheatgen.PY without any error. refer to the example: example_use_cheat_Gen_for_Astroneer_v1.37.4.0.jpg

Post automatically merged: Mar 11, 2026

Refer to the Cheat file by CheatGen.py:

ASTRONEER v1.37.4.0
TID=0100E63013E60000
BID=6F78917B0BFEFED4

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ASTRONEER v1.38.7.0
TID=0100E63013E60000
BID=C9700DA9F646ED8F]

Codes and spoilers in this group are for members. Join the Nintendo SWITCH Cheat Codes Download group to reveal them. It's free.

Register Log in

Codes and spoilers in this group are for members. Join the Nintendo SWITCH Cheat Codes Download group to reveal them. It's free.

Register Log in

ASTRONEER v1.40.3.0
TID=0100E63013E60000
BID=5E899D7CCF6F6508

Codes and spoilers in this group are for members. Join the Nintendo SWITCH Cheat Codes Download group to reveal them. It's free.

Register Log in

 

[LaMano]

Ah interesting... In the last month there was an update here in the very old thread... I started to work on a modernization of the scripts in January until last month.
I have never got it to run but used the old script more on modern UE games from UE version 4.2 and higher.

If someone is interested I will link here my thread I started today and maybe it helps for someone:
Modernized script (massive changes)