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, excels at emulating retro games thanks to its customizable nature.
Before You Begin:
Ensure you have:
- A fully charged Steam Deck.
- An A2 microSD card for game and emulator storage.
- Legally obtained Game Boy ROMs.
- A Bluetooth or wired keyboard and mouse (recommended for easier navigation).
Enable Developer Mode:
- Press the Steam button.
- Navigate 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 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):

- Open EmuDeck and select Quick Settings.
- Enable AutoSave, Controller Layout Match, Bezels, Nintendo Classic AR, and LCD Handhelds.
Add Game Boy Games:

- Use Dolphin File Manager to access your SD card (Primary > Emulation > ROMs > gb).
- Transfer your
.gb
ROMs to the gb
folder, ensuring correct filenames.
Steam ROM Manager Integration:
- Open EmuDeck and select Steam ROM Manager.
- Close the Steam client if prompted.
- Disable Toggle Parsers.
- Add your Game Boy games.
- Save to Steam.
Playing Game Boy Games:
- Press the Steam button, open your Library, and go to Collections.
- Select your Game Boy collection and launch a game.
Customize Game Colors (RetroArch):
- Launch a game.
- Open the RetroArch menu (Select + Y).
- Navigate to Core Options > GB Colorization.
- Enable Auto or Off for color customization.
Using Emulation Station:

- Open your Steam Library, go to Collections, and select Emulators > Emulation Station.
- Select the Game Boy icon and launch your games. The RetroArch menu (Select + Y) also works here.
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 Plugin:

- Access the Decky Loader store via the QAM.
- Search for and install the Power Tools plugin.
Power Tools Settings:
- Launch a Game Boy game.
- Open Power Tools via the QAM.
- Turn off SMTs, set Threads to 4.
- In the Performance menu (QAM), enable Advanced View, Manual GPU Clock Control, set GPU Clock Frequency to 1200, and enable Per Game Profiles.
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 Game Boy games on the Steam Deck! Remember to always use legally obtained ROMs.