To fix the "You’ll need a new app to open this ms-xbl-multiplayer link"
To help narrow down the cause, could you let me know you are using (e.g., PC, Xbox, or mobile) and the specific game throwing this error? Share public link
By applying these updates, you can keep your retro gaming experience running smoothly. If you are still having trouble, please tell me: What are you seeing? Are you using openMSX or another emulator? Share public link
source/net/delta.c
A homebrew game called MSX-Battle just released on MSX.org that uses modern UDP-based linking—no RS-232 required (uses the joystick port's undocumented pins). Check it out.
| Game | Mode | Works on Real HW? | Works on openMSX? | | :--- | :--- | :--- | :--- | | | 2-player competitive | Yes | Yes (with timing fix) | | Thexder | 2-player alternating | Yes | Yes | | Arkanoid | 2-player vs | Yes | Partial (sound desync) | | Golvellius | Data exchange only | Yes | Yes | | King’s Valley II | Co-op puzzle | Yes | Yes (set baud to 2400) |
The absolute fastest and most reliable way to restore missing link handlers is by utilizing the built-in repair tool located directly within the desktop app.
If the link is "dead," you likely need to force Windows to recognize the protocol again.
