@grant2258 Hello I chekc on the system and i'm unable to find a mame2003.log Do you know where it should be. Also I check the runcommand.log, and tehre is only two lines who said that I launch centipede. In the mame menu, I cna assign a button to a mouse click. But it cannot register my mouse moving. Francis

@bpmnyc It wouldn't work for a couple of reasons. Primarily, RetroArch will only use a mouse or pointer device to emulate a light gun. Popular solutions to this are AimTrak USB guns, as well as a Dolphinbar/Wiimote/Gun casing combo. Another big hangup was input lag, as the screen flash has to occur at the exact moment the trigger is pressed. However, thanks to recent developments that were previously thought to be somewhat impossible, this would no longer be an issue when using capable hardware. Still, support would nonetheless have to be added for RetroArch to interface with actual light guns.

@mediamogul tried your config without success. Does your Duck Hunt (World).zip.cfg truly point to the nes/roms folder? I don’t normally run per-game configs but I point mine to the opt.../overlays folder...

@byaaah31 use lr-fceumm for nes zapper. Switch the second controller to zapper. It works better than lr-nestopia. For snes the mouse button works but movevement doesnt for me.

Hope it helps someone! I tried to get the mouse to work as a Zapper. It just wouldn't work. End of the story: I had to unplug the USB-dongle of my remote control, because it had a mouse functionality. I think it had a conflict with my wireless USB mouse. Afterwards I changed mouse index to 0 in lr-fsceumm under Controller 2 Input and changed the type to Zapper. That's it!

@UserFlynn Unfortunately, it isn't that simple. If you want to play these games, you'll need to look into a Windows or Mac-based setup with a PC gaming gun solution from either Ultimarc, ArcadeGuns.com or Mayflash.

@infocorn The light gun games can be played through lr-nestopia with a mouse, air mouse and/or various PC arcade guns that act as mice. Unfortunately, while there is also support for emulating the Power Pad via gamepad buttons, I've never run across a NES to USB adapter that supported the actual Power Pad peripheral itself.

@jimd0586 yesterday, RetroArch added support for light guns in the same category as the AimTrak. I've tested this new functionality with a Dolphinbar/Wiimote and it works great. Since I don't have an Aimtrak gun I'm hoping someone who does will be willing to rebuild RetroArch from source and try out the new feature. Any chance you have one and would be willing to give it a try?