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melonPrimeDS


Modded version of melonDS emulator to play Metroid Prime Hunters.

It's a bit of a hack but the goal is to make the game as fun as possible using mouse and keyboard.

I originally made this for controller but because there's no lock-on, it wasn't really fun to play.

Please read the instructions carefully.

melonPrimeDS.webm

Download

Releases for Windows, Linux and macOS here!

aur

⚠️🖱️ Warning if using mouse acceleration!
Please disable mouse acceleration or it will feel strange.
Find a guide for Windows here and use SteerMouse if on macOS
Wasn't able to get raw mouse input unfortunately.

⚠️ Warning for macOS users!
Once you start the program, you're going to have to go into macOS settings:
Privacy & Security > Accessibility, and ensure melonPrimeDS is enabled.

Instructions

  • Fyi. the emulator hack uses a different config path than melonDS, so this won't conflict

  • Aquire a copy of the USA 1.1 rom of Metroid Prime Hunters
    Other regions don't work because memory injection is used

  • Make sure to set all DS bindings to None in
    Config → Input and hotkeys → DS keypad
    Defaults should already be empty
    (click binding and press backspace)

  • Find Metroid related Keyboard mappings in
    Metroid → Input settings
    Recommended defaults have already been set, but feel free to change them if you want to

    Notes:

    • Focusing the window will capture your mouse. Use ESC to release.
    • The stylus gets placed in the middle of the DS screen for aiming which can cause accidental presses
    • Whilst holding the virtual stylus button Tab, use your mouse to click around on the touchscreen
    • UI OK F will press "OK" on the touch screen, which will also jump and briefly break aiming
    • UI left Q and right E will also press on the touch screen, for scan visor messages
    • When in map view, press Shift to zoom out and LMB to zoom in

  • Find Metroid sensitivity settings in
    Metroid → Other settings

    When in-game, make sure to set the aim sensitivty to the lowest!
    The DS touchscreen isn't very precise, so setting it to lowest helps

  • Also recommended to set audio settings in-game to headphones


Default settings changed from melonDS

  • Fullscreen toggle set to F11
  • Screen layout set to horizontal
  • Screen sizing set to emphasize top
  • Screen filter set to false
  • 3D renderer set to OpenGL
  • 3D scale factor set to 8x for 1440p
  • JIT recompiler set to enabled (helps with performance)

VSync was already disabled but keeping it off also helps with performance

Build

I modified melonDS and played Hunters on Linux. Building is straightforward

mkdir build
cd build
cmake .. -DCMAKE_BUILD_TYPE=Release -GNinja
ninja

Downloadable builds were made using GitHub actions

Todo

  • Change controls when map is open. Need to find memory location
  • Update to latest melonDS
  • Would be really nice if weapon switching was done through the memory