OpenSpeedy

Your Game, Your Pace

OpenSpeedy is a free and open-source game speed controller for Windows. Whether you want to fast-forward through repetitive grinding or slow down to practice tricky boss mechanics, just check the game process, drag the speed slider, and see the effect instantly — no restart, no file modifications.

Core Features

• Real-time Speed Control — Adjust from 0.1x to 1000x with a single slider

• Five Gear Presets — Switch between five speed levels like shifting gears in a car

• Hold-to-Speed — Hold a hotkey to temporarily change speed, release to return to normal

• Global Hotkeys — Adjust speed from anywhere, no need to alt-tab out of the game

• Dual Architecture — Works with both 32-bit and 64-bit game processes

• Always on Top — Keep the speed panel visible while gaming

• Auto Start — Launch with Windows and stay ready

• Multilingual UI — Available in 7 languages

Safe by Design

OpenSpeedy operates entirely in user mode (Ring3). No kernel driver, no game file modification, no memory tampering. It hooks Windows time-related APIs to change how the target process perceives time. This approach is non-invasive, won’t cause blue screens, and keeps your system stable.

Use Cases

• Speed up turn-based grinding and farming

• Skip unskippable cutscenes and dialogue

• Practice boss fights in slow motion

• Accelerate building and crafting in simulation games

• Adapt older games to high refresh rate monitors

Before You Use

• This tool is designed for single-player games only. Using it in online competitive games may trigger anti-cheat systems and result in account bans.

• Extreme speed multipliers may cause physics glitches or crashes. Adjust gradually.

• Some antivirus software may flag the program. Add it to your exclusions list if needed.