OpenSteamTool

OpenSteamTool is a Windows DLL project built with CMake.

Feature

Core Unlocks

• Unlock an unlimited number of unowned games.
• Unlock all DLCs for unowned games.
• Support auto load depot decryption keys from Lua config, no need to manually input them in config.vdf anymore.
• Support auto manifest download thanks to RoGoing's manifest API (https://manifest.steam.run/).
• Support downloading protected games or DLCs that require an access token.
• Support a lightweight way to disable update for specific games(however,it leads to some bad side effects like we can not verify instealled successfully if the app has a new version).

Family Sharing and Remote Play

• Bypass Steam Family Sharing restrictions, allowing shared games to be played without limitations.

Future

• Bind manifest to disable update for specific games
• Enable stats and achievements for unowned games.
• Compatible with games protected by Denuvo and SteamStub.
• Steam Cloud synchronization support.

Usage

1. Run build.bat from the project root to build the project.
2. Copy generated dwmapi.dll and OpenSteamTool.dll to the Steam root directory.
3. Create Lua directory (for example C:\steam\config\lua) and place Lua scripts there. The DLL will automatically load and execute them.
4. Lua example:

addappid(1361510) -- unlock game with appid 1361510

addappid(1361511, 0,"5954562e7f5260400040a818bc29b60b335bb690066ff767e20d145a3b6b4af0") -- unlock game with appid 1361511 depotKey is "5954562e7f5260400040a818bc29b60b335bb690066ff767e20d145a3b6b4af0" 

addtoken(1361510,"2764735786934684318") -- add access token ("2764735786934684318") for game with appid 1361510 

pinApp(1361510) -- pin game with appid 1361510 to prevent it from being updated

Build

Requirements

• Windows 10/11
• CMake 3.20+
• Visual Studio 2022 with MSVC (x64 toolchain)

Quick build

build.bat

Output

• Debug: build/Debug/OpenSteamTool.dll and build/Debug/dwmapi.dll
• Release: build/Release/OpenSteamTool.dll and build/Release/dwmapi.dll

Disclaimer

This project is provided for research and educational purposes only. You are responsible for complying with local laws, platform terms of service, and software licenses.