Ga naar hoofdinhoud
Order before 14:00, ships the same day.
xaleste
Back to guides

Miyoo Mini Plus with games: how to get the most out of your MM+ from RetroGear

November 24, 2025
Miyoo Mini Plus met games: zo haal je alles uit je MM+ van RetroGear

The MM+ Game Guide

OnionOS screen on a retro handheld games console with a few buttons and a pink background

Thank you for choosing RetroGear and your new MM+ Miyoo Mini Plus with games set-up.
We’re big fans of Miyoo and test every Miyoo Mini Plus ourselves before it leaves the shop. In this guide, we’ll show you step by step how to install games on your MM+ in a legal way and how to get the most out of your RetroGear handheld.

Important to know straight away:

  • RetroGear supplies you with Miyoo Mini Plus with OnionOS pre-installed, so you have a great user interface straight away.
  • We do not supply commercial ROMs or illegal games. This is simply not permitted under copyright law, and this applies to all reputable EU online shops.
  • We’re happy to help you get started with open-source and homebrew games that you’re actually allowed to use legally.

A ROM is a file containing a game’s software. That software can:

  • be open source or homebrew (created and released by amateur developers), or
  • Be commercial and protected (for example, old Game Boy Nintendo titles).

Only the first category may be downloaded and shared freely. For commercial games, the following applies:

  • Always buy them yourself and respect the creators’ rights.
  • Making backups is permitted in some cases, but downloading complete ROM sets of commercial games is almost always a breach of copyright.

That is why RetroGear focuses on legal homebrew and open-source games.

To help you get started quickly with your MM+ Miyoo Mini Plus with games, we at RetroGear have put together a small selection of open-source Game Boy, Game Boy Colour and Game Boy Advance games.
This collection:

  • Consists of games under a MIT licence or a similar open-source licence.
  • We have tested it on the Miyoo Mini Plus running OnionOS.
  • Gives you a few great titles to play straight away as soon as you launch MM+.

You can download the RG-MIT Collection via this link RG-MIT collection

Step 1: Choose the right systems in OnionOS

When you start up your Miyoo Mini Plus for the first time, you’ll see the OnionOS menu. From there, you can choose which systems you want to make visible on your handheld.

  1. Start up your MM+.
  2. From the main menu, go to the package manager / system selection menu.
  3. Be sure to select at least the following systems:
    • Nintendo – GB (Game Boy)
    • Nintendo – GBC (Game Boy -Colour)
    • Nintendo – mGBA (Game Boy s Advance)

Here’s how to ensure your MM+ Miyoo Mini Plus is set up and ready for your Game Boy library.

Overview of the package manager menu in OnionOS on the Miyoo Mini Plus, showing various emulator options.

Figure 1 – OnionOS on the Miyoo Mini Plus

Subtitle: Overview of the systems in OnionOS on the Miyoo Mini Plus from RetroGear.
Recommended ALT text: MM+ Miyoo Mini Plus met OnionOS menu en Nintendo systemen geselecteerd

Step 2: Download games for your Miyoo Mini Plus

Now it’s time to collect games for your MM+.

2.1 Homebrew and open-source games (optional)

We recommend starting with homebrew and open-source titles. Examples include:

  • Small indie projects created specifically for the Game Boy and GBA
  • Experiments by amateur developers
  • New games with a retro feel that are deliberately offered as ROMs

You can often find these on platforms where developers share their work themselves and where you can support them directly.

2.2 The RG-MIT Collection of RetroGear

RetroGear has a starter pack ready and waiting for you:

  1. Download the RG-MIT Collection via this link RG-MIT collection
  2. Unzip the ZIP file on your computer.
  3. You will be left with a folder called Roms, containing subfolders for each system, such as:
    • GB
    • GBC
    • GBA

These folders correspond directly to the structure of OnionOS on Miyoo Mini Plus.

Step 3: Installing games on your MM+ Miyoo Mini Plus

Now we’re going to copy the games onto your microSD card for the Miyoo Mini Plus.

  1. Switch off your MM+ by holding down the on/off button in the top right-hand corner.
  2. Take the USB card reader out of the box that came with your Miyoo Mini Plus from RetroGear.
  3. Remove the microSD card from your MM+.
  4. Insert the microSD card into the card reader and connect it to your computer.
  5. A drive will now appear on your computer, often named RETRO.

Open this drive and you will see a structure like the one below:

Figure 2 – Folder structure of the ‘ Miyoo Mini Plus ’ SD card

File structure of the microSD card for the Miyoo Mini Plus, featuring various folders such as Roms, BIOS and more.

Subtitle: Main structure of the Retro microSD card for the Miyoo Mini Plus running OnionOS.
Recommended ALT text: Bestandsstructuur RETRO schijf voor Miyoo Mini Plus met OnionOS mappen

3.1 Replacing the Roms folder

  1. Look for the Roms folder on the RETRO disc.
  2. Replace this Roms folder with the Roms folder from the RG-MIT Collection that you have just extracted.
  3. Please check that the structure looks like this:

RETRO/Roms/GB/Game.gb
RETRO/Roms/GBC/Game.gbc
RETRO/Roms/GBA/Game.gba

Figure 3 – ROMs folder containing ‘ Game Boy ’ games

File structure of the microSD card for the Miyoo Mini Plus, with separate ROM folders for Game Boy, Game Boy Colour and Game Boy Advance games

Subtitle: Example of the Roms/GB folder containing open-source Game Boy games on the Miyoo Mini Plus.
Recommended ALT text: Miyoo Mini Plus Roms map met Game Boy homebrew games

Step 4: Refresh the game library on your Miyoo Mini Plus

Once the files are on the SD card, you can restore everything:

  1. Safely eject the RETRO drive from your computer.
  2. Remove the microSD card from the card reader and pop it back into your Miyoo Mini Plus.
  3. Restart the MM+.
  4. In the main menu, press Select.
  5. You will now see a prompt to refresh the game list. Select Yes or Refresh.

Next, go to the Games tab. You will now see the systems you enabled earlier, followed by the game collection you have just added to the SD card.

Congratulations: your MM+ Miyoo Mini Plus with games is now ready to play.

Extra tips from RetroGear for you Miyoo Mini Plus

As RetroGear and Miyoo have now become a staple combination for our customers, we’d like to share a few more tips on how to get the most out of your handheld:

  • Using save states
    OnionOS makes it easy to save your progress at any time. Ideal for short gaming sessions whilst on the move.
  • Keep discovering homebrew and indie games
    New Game Boy and GBA projects are still being released. Keep an eye out every now and then for new open-source titles to add to your collection.
  • Other RetroGear handhelds
    Are you looking for something different after the Miyoo Mini Plus? RetroGear also stocks other emulation handhelds and modded Game Boys, all tested and set up with the same care.
  • Below you’ll also find the shortcuts for the Miyoo.

Figure 4 – Miyoo Mini Plus shortcuts – cheat sheet

Overview of the buttons and functions on the MM+ game controller, with instructions on how to use it

Subtitle: Example of the Roms/GB folder containing open-source Game Boy games on the Miyoo Mini Plus.
Recommended ALT text: Miyoo Mini Plus Roms map met Game Boy homebrew games

Need help with your MM+ Miyoo Mini Plus?

Are you having trouble or do you have any questions about your **Miyoo Mini Plus ** gaming setup from RetroGear?

  • Send us a message on Instagram via @retrogear.gg
  • Or use the contact options on our website.

We’re a small online shop, but we do our very best to offer you personalised assistance.

Did you find this guide useful? If so, we’d really appreciate it if you could:

Thank you on behalf of the whole RetroGear team, and we hope you enjoy playing your MM+ Miyoo Mini Plus!

Jorne – RetroGear