OpenSpeedy README

OpenSpeedy

The Best Open-Source Game Speed Controller

🚀 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

🔧 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.