OpenSpeedy
The Best Open-Source Game Speed Controller
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🚀 Features
- Quick speed adjustment
- Modern UI
- Supports both x86 and x64 platform processes
- No kernel intrusion — Ring-3 level hooking, does not tamper with the system kernel
💾 Installation
📦 Method 1: Winget
# Install command winget install openspeedy # Open a new terminal and run openspeedy openspeedy
📥 Method 2: Manual Download
Visit the Releases page to download the latest version.
🎮 Method 3: Steam (Optional)
Get it on the Steam store. This is an optional way to install.
💻 System Requirements
- OS: Windows 10 or later
- Platform: x86 (32-bit) and x64 (64-bit)
📝 Usage
- Launch OpenSpeedy
- Run the target game you want to speed up
- Select the game process and adjust the speed multiplier in the OpenSpeedy interface
- Takes effect immediately — see the comparison below
2026-06-20.20-40-21.mp4
🔧 How It Works
Prerequisites:
- Node.js 18+
- Rust
- CMake
- Visual Studio (with C++ desktop development workload)
Build command:
npm run tauri dev
OpenSpeedy adjusts game speed by hooking the following Windows system time functions:
| Function | Library | Purpose |
|---|---|---|
| Sleep | user32.dll | Thread sleep |
| SetTimer | user32.dll | Creates message-based timers |
| timeGetTime | winmm.dll | Retrieves system uptime in milliseconds |
| GetTickCount | kernel32.dll | Retrieves system uptime in milliseconds |
| GetTickCount64 | kernel32.dll | Retrieves system uptime in milliseconds (64-bit) |
| QueryPerformanceCounter | kernel32.dll | High-resolution performance counter |
| GetSystemTimeAsFileTime | kernel32.dll | Retrieves system time |
| GetSystemTimePreciseAsFileTime | kernel32.dll | Retrieves high-precision system time |
| SetWaitableTimer | kernel32.dll | Sets a waitable timer |
| SetWaitableTimerEx | kernel32.dll | Sets a waitable timer (extended) |
⚠️ Warnings
- This tool is for educational and research purposes only
- Some online games have anti-cheat systems — using this tool may result in account bans
- Excessive speed may cause game physics engine glitches or crashes
- Not recommended for use in competitive online games
- Open-source software without digital signatures may trigger false positives from antivirus software
🔄 Feedback
If you encounter any issues, please reach out via:
- FAQ — Check the wiki first for common issues
- GitHub Issues — Submit bug reports. Please do not submit cloud storage related issues, thank you for your cooperation~ 🙏
License
OpenSpeedy is licensed under the GPL v3 license.
🙏 Acknowledgments
OpenSpeedy uses source code from the following projects. Thanks to the open-source community! If OpenSpeedy helps you, a Star is welcome!
- minhook: For API hooking
- tauri: GUI framework
- MUI: UI component library
- Ant Design: UI splitter component
Disclaimer: OpenSpeedy is intended for educational and research purposes only. Users assume all risks and liabilities associated with the use of this software. The author is not responsible for any loss or legal liability arising from the use of this software.