FS25 Extract source code

1. Preparation

• Install python
• Install rust
• Create a new folder on your system
• Download QuickBMS in a subfolder named "quickbms"
• Download Medal Lua decompiler in a subfolder named "medal"

2. Extract game archive

Run this command to create a new folder named "l64" containing raw games sources. Press y when prompted to load dll

quickbms\quickbms.exe extract_fs25_sourcecode\gar_giants.txt "C:\Program Files (x86)\Steam\steamapps\common\Farming Simulator 25\dataS.gar" l64

3. Decode scripts l64 files

Run this command to decode the .l64 files in place (files' content is replaced with decoded content)

python extract_fs25_sourcecode\l64Decoder.py l64

4. Decompile lua scripts

Make sure you have the nightly version installed

rustup install nightly

Decompte lua scripts

python extract_fs25_sourcecode\decompile_lua.py medal l64 <output_path>

5. Enjoy

That's it! You should now have a folder containing all FS25 lua scripts.

Note: The names of the local variables and functions arguments are obfuscated, but the names of the functions and global variables are not.

Credits

• @TAEMBO for the QuickBMS script gar_giants.txt
• @Rockstar94FS for the l64 file decoder l64Decoder.py