This guide details how to install EmuDeck and play Game Boy games on your Steam Deck, optimizing performance with Decky Loader and Power Tools. The Steam Deck, a powerful handheld, is highly customizable and perfect for retro gaming.
Before You Begin:
Ensure you have:
- A fully charged Steam Deck.
- An A2 microSD card for games and emulators.
- Legally obtained Game Boy ROMs.
- A Bluetooth or wired keyboard and mouse (recommended for easier navigation).
Enable Developer Mode:
- Press the Steam button.
- Go to System > Developer Mode and enable it.
- Enable CEF Debugging in the Developer menu.
- Switch to Desktop Mode.
Install EmuDeck:

- Connect your keyboard and mouse.
- Download EmuDeck from its website using a browser (e.g., Firefox).
- Choose SteamOS and select "Download for Free."
- Select "Recommended Settings" then "Custom Install."
- Choose your SD card as the Primary installation location.
- Select desired emulators (RetroArch, Emulation Station, Steam ROM Manager recommended).
- Enable Auto Save.
- Complete the installation.
Quick Settings (EmuDeck):

- Enable AutoSave.
- Select Controller Layout Match.
- Enable Bezels, Nintendo Classic AR, and LCD Handhelds.
Add Game Boy Games:

- Use Dolphin File Manager to access your SD card's
Emulation/ROMS/gb
folder.
- Transfer your
.gb
ROM files (correctly named) into this folder.
Use Steam ROM Manager:
- Open EmuDeck and select Steam ROM Manager.
- Close the Steam client if prompted.
- Disable Toggle Parsers.
- Add your Game Boy games.
- Save to Steam.
- Wait for completion and close Steam ROM Manager.
- Return to Gaming Mode.
Play Your Games:
- Press the Steam button.
- Go to Library > Collections.
- Select your Game Boy collection and launch a game.
Customize Colors (RetroArch):
(Not all games support this)
- Launch a game.
- Open the RetroArch menu (Select + Y).
- Go to Core Options > GB Colorization.
- Choose "Auto" or "Off."
Use Emulation Station:

- Press the Steam button.
- Go to Library > Collections > Emulators > Emulation Station.
- Select Game Boy and launch your game. RetroArch menu access (Select + Y) remains functional.
Install Decky Loader:

- Switch to Desktop Mode.
- Download Decky Loader from its GitHub page.
- Run the installer and choose Recommended Install.
- Restart your Steam Deck in Gaming Mode.
Install Power Tools:

- Access Decky Loader's store via the QAM.
- Search for and install Power Tools.
Power Tools Settings:
- Launch a Game Boy game.
- Open Power Tools via the QAM.
- Turn off SMTs. Set Threads to 4.
- Go to Performance > Enable Advanced View.
- Enable Manual GPU Clock Control. Set GPU Clock Frequency to 1200.
- Use Per Game Profile to save settings.
Restoring Decky Loader After a Steam Deck Update:

- Switch to Desktop Mode.
- Re-download Decky Loader from GitHub.
- Run the installer (Execute only).
- Enter your pseudo password (create one if needed).
- Restart your Steam Deck.
Enjoy your enhanced Game Boy experience on your Steam Deck!