all right, it was a silly one:
#!/usr/bin/env bash rp_module_id="mcpi" rp_module_desc="mcpi-reborn" rp_module_licence="PROP" rp_module_section="exp" #rp_module_flags="!all videocore" function depends_mcpi() { getDepends xorg matchbox-window-manager } function install_bin_mcpi() { [[ -f "$md_inst/minecraft-pi" ]] && rm -rf "$md_inst/"* aptInstall minecraft-pi } function remove_mcpi() { aptRemove minecraft-pi } function configure_mcpi() { addPort "$md_id" "mcpi" "mcpi" "XINIT-WMC:/home/pi/RetroPie/roms/ports/.data/minecraft-pi-reborn-client-2.5.3-arm64.AppImage --default" }Just needed to get rid of the filter flag.
And by the way, all those intro setup windows can be skipped using the --default flag.
Thank you!