gazyi/uncso2

An CSO2 pkg extractor

UnCSO2

Extracts the encrypted content of Counter Strike Online 2's pkg files. At the moment only Tiancity's (chinese) version is compatible.

Download

You may download the latest build of UnCSO2 here.

How to use

Open the program, then go to File > Open Folder and choose Counter Strike Online 2's data directory.

After loading the game's data, you may choose which files you wish to unpack by ticking their respective check box.

When you're done selecting the files, press Unpack selected items and choose the directory where you wish to extract the files.

Options

In Options you may pick:

• Decrypt encrypted files - it decrypts files when needed (such as .etxt files);

• Rename encrypted files - renames decrypted files extension (.etxt would become .txt);

• Decompress VTF files - decompresses texture files in order to make them usable by games such as Counter-Strike: Source;

• Replace toolsshadowblock.vmt - replaces toolsshadowblock.vmt content with an invisible material. toolsshadowblock.vmt is used in most of CSO2 maps and will display a black and yellow texture if used by other Source Engine game;

• Decompress BSP files - decompresses map files;

• Convert BSP lumps - tries to convert the maps to a more Counter-Strike: Source friendly version. Note: due to stock Source Engine limitations, some maps cannot be converted;

Bug reporting

Feel free to open an issue if you find a bug in the tool.

The tool is also open to improvements, open a pull request if you have any.

How to build

Requirements

• Visual Studio 2017
• Qt 5.10
• Qt VS Tools
• Windows PowerShell

Currently only Windows is supported.

Before building

On the project directory, run powershell ./setupcryptopp_win.ps1. This Powershell script will replace a string in Crypto++'s cryptolib.vcxproj file to make it build with the MultiThreadedDLL instead of MultiThreaded so they can be compatible with prebuilt Qt binaries.

An alternative would be building Qt with MultiThreaded.

Building

Open the solution UnCSO2.sln and build it in your preferred configuration.

If built successfully, you will find your binary inside the bin directory.

Credits

• Ekey for reversing the unpacking algorithm
• weidai11 for Crypto++
• The Qt Company for Qt
• George Anescu for his CRijndael class
• RPCS3's team for some UI code and the Git version header generator script
• Valve Software and Igor Parlov for the lzmaDecoder

For more information check the license specific file of each project