Light gun guide

If you've ever been in a video game arcade before it's almost guaranteed you've seen a specially large cabinet featuring a fake “light” gun which could be used to aim at a screen displaying the game, one example being Terminator 2: Judgment Day. Thanks to the efforts of various developers and hardware manufacturers, it is now possible to bring that experience to the home using Batocera! This also includes the various home ports of such light gun games such as the infamous Duck Hunt.

Once the light guns are connected, a crosshair will appear on the screen:

The game list will also indicate which games are light gun compatible with a small theme-specific icon next to the name (this can be optionally disabled):

So first and foremost a light gun is needed, possibly multiple if intending on doing multiplayer (be careful of having enough physical space for both collision avoidance and tracking). Various light guns have entered the market and each offer their own advantages and disadvantages. If not specified, the light gun is compatible with all displays. Click the light gun to go to its section.

Precision rating is based on five tests:

1. Calibration: is it triggering correctly and working as intended?
2. Corner: is it aiming properly in extremities?
3. Position: is it accurate if you physically move from your stand position?
4. Rotation: is it accurate if you rotate the gun while aiming the same target?
5. Latency: is it triggering offscreen reload if quickly moving the aim outisde the display?

Light gun	Tracking method	Precision	Minimum distance required ( x * display size)	Connectivity	Estimated price	Notes
AE Lightgun	Infrared	★★☆☆☆	3x to 3.5x	USB cable (290 cm)	$125	Requires at least nine feet/three metres of space to use. Has calibration issues, requiring multiple attempts before it will apply.
Ultimarc Aimtrak	Infrared	★★☆☆☆	2x to 2.5x	USB cable (370 cm)	$95 (w/o recoil)/$120 (w/ recoil)	Has calibration issues, requiring multiple attempts before it will apply.
Blamcon Light Gun	Infrared			USB cable		Larger displays require more physical distance (or wide/fish lens). Initial support starting v41.
Mayflash Dolphinbar with Wiimote gun	Infrared	★☆☆☆☆	1.5x	Connect Dolphinbar to machine via USB cable, then Wiimotes to Dolphinbar via Bluetooth	$10-20 second-hand Wiimote + $35 Dolphinbar	Works universally across machines and Wiimotes, but tends to jitter. No calibration possible, crosshair is mandatory. This is the only option on v34 and lower. Also, the Wiimote itself is wireless (most other light guns are wired).
Direct Wiimote gun with IR bar	Infrared	★★★☆☆	2.5x	Bluetooth	$10-20 second-hand Wiimote + $3-$10 IR bar	Need to have a powered IR sensor bar, but is far more accurate than using the Dolphinbar. Also, the Wiimote itself is wireless (most other light guns are wired). It is possible to convert the Mayflash Dolphinbar into a regular IR sensor bar with a firmware update, to use it as if though it were just a regular IR bar (this disables the Dolphinbar's Bluetooth connection, the Wiimote must be connected to a different device).
Fusion Lightgun	Infrared	★★★☆☆	2.5x	USB cable	$80 (DIY)/$200 (pre-assembled)	Larger displays require more physical distance (or wide/fish lens). Using SAMCO technology.
GUN4IR	Infrared	★★★★★	1.2x (with fisheye lens) to 2x (without lens)	USB cable	$80 (DIY)/$200 (pre-assembled)	Larger displays require more physical distance (or wide/fish lens). Full support starting v36.
Namco GunCon2/G-Con2	Cathode ray timing	★★★★★	0.2x to 1x	Composite/component cable	$25-$50 second-hand, low availability	Limited to analogue displays which supports composite/component input. This cannot be used on a modern digital display.
GunCon3	Infrared	★★★☆☆	1.5x to 2x	USB cable		Larger displays require more physical distance (or wide/fish lens). Full support starting v38.
Retro Shooter	Infrared	★★☆☆☆ (2 IR) ★★★☆☆ (4 IR)	2.5x to 3x (2 IR) 2x (4 IR)	USB cable	185$ including a pedal and hub for recoil	Recoil can optionally be disabled or put to single shot. Two IR requires massive distance or fish lens. Full support starting v39.
SAMCO light gun		★★★★☆	1.5x	USB cable
Sinden Lightgun	White border on display	★★★★☆	1.5x	USB cable (480 cm)	$100 (w/o recoil)/$160 (w/ recoil)	Recoil can optionally be disabled. Requires shrinking the game screen to display the white borders. Has limitations on how many guns can be used per USB hub.

When a light gun is connected, a light gun symbol will appear in place of the controller activity icons (if that is enabled and the theme supports it). In addition, a new menu item will appear in the CONTROLLERS & BLUETOOTH SETTINGS menu specific to the light guns that are currently connected. This can be used to adjust settings specific to that light gun.

Depending on the light gun, global calibration may be required. All global calibration can be performed at any time, even during gameplay, however this sort of calibration will always be for global calibration (it is not saved per-game, it's only needed to be done once). Refer to the section relevant to your light gun below for instructions.

The Wii was revolutionary for its motion-based controls when it released back in 2006. This technology can now be used to emulate a light gun in Batocera, useful if you happen to have an old Wiimote and sensor bar laying around that is unused (though for convenience, buying a USB-powered sensor bar may be necessary). This is recommended over using the Mayflash Dolphinbar as the direct connection has far superior accuracy.

This is a special mode for the Wiimote when connected to Batocera. This will be referred to as the Wiimote gun from now on. Requires Batocera v35 or higher.

Set up the powered IR bar by taping over one side with solid tape and positioning the remaining LED at the bottom/top center of the display. Counter-intuitively, this setup works best when only one IR LED is visible (otherwise the cursor on-screen may “jump” when aiming at the edges).

Connect the Wiimote directly as a regular Bluetooth device. A notification will appear indicating that the Wiimote has connected in its gun mode, with a little light gun icon appearing (if the theme supports it). Once connected, press and hold the [Home] button for three seconds. A target will appear in the center of the screen, aim the Wiimote at it from your neutral shooting position and press [B]. Then a target will appear at the top-left; aim at that and press [B] again.

If the second target cannot be shot at, move further away from the display and repeat the process from the start. It may also help to put the IR bar above the monitor instead of below.

The Mayflash Dolphinbar is a third-party accessory that was initially designed to allow Wiimotes to be used as a cursor for PCs, or to allow for direct passthrough of the Wiimote to the Dolphin emulator (hence the colloquial name). Batocera can use it to emulate a light gun.

Unlike the direct Wiimote connection method, modes 1 and 2 do not utilize any special Wiimote gun mode in EmulationStation to function, instead the Dolphinbar itself emulates being a mouse and keyboard to the machine. When in these modes, it does not allow for global calibration, meaning that it will not likely match your display one-to-one (just like the original Wii did). It is also the only available option for light gun play on v34 and lower.

Certain third-party remotes that don't work over native Bluetooth may work with the Dolphinbar, as it uses its own Bluetooth stack separate from the host machine.

The Mayflash Dolphinbar requires manual action, compared to other solutions which automate most of the process. Because of this, it has its own page.

The Namco GunCon (known as G-Con in Europe) is a PlayStation peripheral first released in 1994, with the GunCon 2 for the PlayStation 2 following it up in 2001. If you have a GunCon 2 and a compatible analogue TV, you may be able to utilise it with Batocera. This cannot be used on a modern digital display. Requires Batocera v36 or higher.

Create a sh file inside the ports folder

/userdata/roms/ports/GunCon2_Calibration.sh

chmod +x /userdata/roms/ports/GunCon2_Calibration.sh

GunCon2_Calibration.sh

#!/bin/bash
xrandr --output $(xrandr | grep -o '.* connected' | sed 's/ connected//') --gamma 1:1:1 --brightness 2.0
guncon2_calibrate.sh
xrandr --output $(xrandr | grep -o '.* connected' | sed 's/ connected//') --gamma 1:1:1 --brightness 1.0

• The first line will increase the brightness via xrand
• The second line will launch the calibration script via switchres
• The third line will set the brightness back to default once the script exits.

You only need to do a first calibration once.

• Start the calibration by pressing the gun trigger.
• Follow the onscreen instructions and aim at all the 4 circles with the cross in the middle.
• Try to be as exact as possible.
• The result will not be perfect even if you aimed exactly in the middle using the GunCon2's crosshair.
• This is normal..
• Exit the script and save the settings by pressing A or B

• Button C + D-pad left/right → decrease x-min → apply if your gun is out on left of the screen
• Button C + D-pad up/down → increase x-max → apply if your gun is out on right of the screen

The Namco GunCon 3 (known as G-Con 3 in Europe) is the last PlayStation peripheral of the series, released in 2007 in a bundle with Time Crisis 4. Instead of CRT, the light gun uses similar technology to Wiimote, with infrared LEDs placed left and right on top of the display.

Requires Batocera v38 or higher.

Place the infrared LEDs properly with enough distance between them, on top of your display, front facing the gun. Refer to official manual for best setup.

V39: to start calibration, press and hold B2 button, then proceed to shoot each target.

V40 or higher: to start calibration, press and hold C2 button.

The Ultimarc Aimtrak comes with its own IR bar which can be mounted on the top of or at the bottom of the display, much like the Wiimote. Requires Batocera v35 or higher.

Connect both the light gun and the IR bar via USB. Then, hold main trigger for five seconds to launch the global calibration process. Shoot the top-left, top-right and bottom-center targets as they appear.

If using a recoil model, a separate power supply is required. This is not bundled with the light gun. More info can be found on its store page. Scroll to Recoil Power Requirement (Guns with recoil option only) section.

The AE Lightgun comes with its own IR bar which can be mounted on the top of or at the bottom of the display, much like the Wiimote and Ultimarc AimTrak. Requires Batocera v35 or higher.

Connect both the light gun and the IR bar via USB. Then, press the button in front of the main trigger to launch the global calibration process. Shoot the middle, top-right and bottom-left targets as they appear.

The Sinden Lightgun is a light gun which uses a regular camera looking at a white border to perform its tracking. Batocera will automatically enable a white border when the Sinden Lightgun is connected, as well as shrinking the content of the games to accomodate for this. Requires Batocera v35 or higher.

Connect the USB cable to the machine. Then hold left on its D-pad for five seconds. Shoot the center of the screen. Calibration is complete.

Sinden Lightguns offer the following options in CONTROLLER & BLUETOOTH SETTINGS → SINDEN GUN SETTINGS

• BORDER SIZE: Thin, medium or big. By default, the medium one is enabled (the size may differ depending on the emulator).
• BORDER MODE: Select when to display the border.
  • NORMAL: Always shown in EmulationStation and in game (default)
  • IN GAME ONLY: Only shown when playing a light gun game.
  • HIDDEN: Disable, useful if using your own bezels with their drawn border.
• BORDER COLOR: Change the color of the border either in white (default), red, green or blue.
• CAMERA CONTRAST: Adapt the camera contrast to your setup (daytime/bright, default, dim display/evening)
• CAMERA BRIGHTNESS: Adapt the camera brightness to your setup (daytime/bright, default, dim display/evening)
• CAMERA EXPOSURE: Adjust the camera exposure to your setup (useful for projector/crt)
• RECOIL: Adjust the behaviour and strength of the force-feedback when holding down the trigger.
  • No recoil: No force-feedback at all.
  • Gun: Recoil, delay, then rapid recoil until trigger is released.
  • Quiet gun: Same as “Gun”, but less intensity.
  • Machine gun: Rapid recoil until the trigger is released.
  • Quiet machine gun: Same as “Gun machine”, but less intensity.

For the time being, any custom and manual settings must be done inside Windows with GUN4IR tool and burned into the light gun.

If you have the calibration button, press it and shoot all targets in turn.

The Retro Shooter comes with its own IR leds (two on older models; four since october 2023). They are mounted at top corners (2IR) or all four corners (4IR) of the display, similar to SAMCO and Fusion Lightgun.

Requires Batocera v39 or higher.

Place IR leds as shown below :

To calibrate the light gun, press and hold 3 seconds the rear left button, then proceed on shooting target. Make sure you are far enough from your display and sunlight is out. If you are with 2IR leds, you need to double that distance.

The light gun will reboot with updated values once calibration is done.

• To switch between single shot or automatic, press and hold stick button 3 seconds to change its mode.
• To turn off the recoil, unplug the recoil cable or press and hold stick button while powering it.

A table showing which emulators and cores support light guns (must be switched manually for systems using a default core not compatible with light guns).

System	Emulator	Initial gun support	Crosshair ?	Multi-guns ?	Notes
3do	retroarch/opera	35	✔	✘	Multiplayer unsupported for now
amstradcpc	retroarch/cap32	37	✔		Supported but not out of the box
arcade	mame	35	✔	✔
	retroarch/mame	40	✔	✔
	retroarch/mame2003	35	✔	✔
	retroarch/mame2010	✘
	retroarch/fbneo	35	✔	✔
atari800	mame	✘
atari2600	retroarch/stella	35	✘	✔
atari7800	mame	✘
atomiswave	retroarch/flycast	35	✔	✔
	flycast	35	✔	✘	Not out of the box, multiplayer unsupported for now
c64	libretro/vice_x64	35	✔
	vice/x64	35		✔
daphne	hypseus	35	✔	✘
dreamcast	retroarch/flycast	35	✔	✔
	redream	35	✔	✘
	flycast	35	✔	✘	Multiplayer unsupported for now
gx4000	retroarch/cap32	37	✔		Supported but not out of the box
master system	retroarch/genesisplusgx	35	✔		~1)
megadrive	retroarch/genesisplusgx	35	✔	✘
model2	model2emu	35	✔	✘	Multiplayer unsupported for now
model3	supermodel	35	✔	37
naomi	flycast	35	✔	✘	Multiplayer unsupported for now
	retroarch/flycast	35	✔	✔
namco2x6	Play!	35	✘	✘	Namco 2×6 emulation is very early
nes	retroarch/nestopia	35	✔
	retroarch/fceumm	35	✔
	retroarch/mesen	35	✘
psx	duckstation	40	✔	✘	Multiplayer unsupported for now
	retroarch/mednafenpsx	35	✘	✘	Only works with software renderer
	retroarch/PCSXrearmed	35	40	✔
	retroarch/swanstation	35	38	✘
ps2	PCSX2	37	40	✔
	retroarch/PCSX2	✘
ps3	RPCS3	36	40	✔	PS Move emulation is very early
saturn	retroarch/beetle-saturn	35	✔	✔
	retroarch/kronos	✘
segacd	retroarch/picodrive	✘
	retroarch/genesisplusgx	35	✔
snes	retroarch/snes9x_next	✘
	retroarch/snes9x	35	✔		~2)
	retroarch/mesen-s	35	✘
	retroarch/bsnes	35	✘
steam	steam	35		✘
wii	dolphin	36	✔	✔
	retroarch/dolphin	✘	✔		Kind of supported but not out of the box
windows(wine)	wine/lutris	Untested		✘
	wine/proton	35		✘
xbox	xemu	✘
zxspectrum	retroarch/fuse	✘

Games which are light gun compatible will belong to the light gun genre in EmulationStation. Some themes support showing this tag to make it easier to quickly identify which games are light gun games. It is also possible to enable the light gun category as a selectable system.

Each light gun has its own button code when pressed. This code is translated to a global code in Batocera. When triggered, the global code will be translated into the emulator to a specific command. In the future, it will be possible to customize the mapping.

For example: when pressing the physical MINUS button on the Wiimote, it triggers the button event KEY_PREVIOUS, which is translated to the global code event BTN_1 in Batocera, which activates the Coins value in Naomi and MAME arcade games.

Starting v40, pedals are supported out of the box. By default, they are automatically mapped on the following key according to each player:

• C key for Player 1
• V key for Player 2
• B key for Player 3
• N key for Player 4

This can be customized to your taste in /userdata/system/batocera.conf by adding one line per player:

controller.pedals1=c

1 is the player number; c is the chosen key. If you want player 2 foot pedal to be right crtl, then:

controller.pedals2=rctrl

Support across emulators is a work in progress.

A list of tested light gun games (and any notes that pertain to them specifically) can be found on its own spreadsheet.

Beta testing, bug-finding and workarounds are welcomed on the Discord channel #lightguns or on the mega-issue report.

Although most light gun games will be plug and play, certain titles/emulators require extra actions (typically calibration in the emulated game itself). These are limitations of the software, but will be automated in the future for games that require it.

In-game recalibration is required, located in the game menu options. This is different per-game. This only needs to be done once.

The current accuracy is not perfectly 1:1, caused by a fake and forced 4:3 ratio. This will be fixed in the future.

Configure the emulator first (controller to Lightgun, map missing buttons) ( how? step-by-step)

Commodore 64 games were released in various mediums. It was very common for all tape ROMs (TAP files) light gun games to also feature a joystick version on the other side of the tape. In order to use light guns, the light gun version of the game is needed. Disk images usually support both.

By default, the crosshair is on in Batocera from v35 to v37. This crosshair does not follow where the light gun is actually pointing.

To disable it, open /SHARE/saves/model2/model2emu/EMULATOR.ini and search for the line DrawCross = 1. Change the value to 0 and save the file.

Supermodel white border for Sinden Lightguns is currently disabled on rpi4 and rpi5. This will be added in the future.

Starting v39, all gun games are compatible with both Justifier and GunCon light gun controller type in PCSX-reARMed core. If a GunCon conversion patch was applied to the ROM, you will need to force GunCon controller type in EmulationStation.

In v35 to v38 however, all PSX emulators are only compatible with GunCon ROMs (with exception to libretro: mednafen, which should be compatible with all ROMs but a bug prevents the use of any light guns), so any non-GunCon ROMs require the Nuvee patch in order to function with light guns in the emulators: https://forums.pcsx2.net/Thread-Nuvee-PS1-PS2-input-plugin-supporting-lightguns-by-Shalma. Instructions are in the .7z file, respectively for each patchable ROM.

Otherwise, light gun games with justifiers are playable with libretro: mednafen psx core, but need to have the following settings adjusted:

1. Open RetroArch quick menu with [HOTKEY] +
2. Select Core Options
3. Change Renderer (Restart Required) to “Software”
4. Go back and select Controls option
5. In Port # controls change the Device Type to “Justifier”
6. Restart the game in the RetroArch quick menu

In-game recalibration is required, located in the game menu options. This is different per-game. This only needs to be done once.

The Justifier controller type does not work in libretro: mesen-s and libretro: bsnes, rendering Lethal Enforcers unplayable with these cores.

Veteran users may recall the controller type option in the advanced system settings for each system needing to be set to a particular light gun (specific to that system) in order to play light gun games. As of v35, this is no longer necessary, as Batocera will automatically use the appropriate controller type if a light gun is connected. The crosshair option will also be automatically disabled for the light guns - except if you play with the Mayflash Dolphinbar, which will be automatically enabled.

Two new options have been added to the global game options:

• USE GUNS: The magic that enables all of this to be configured automatically.
• SHOW LIGHTGUN CROSSHAIRS: Opt to manually show the crosshairs (perhaps to assist with aiming in general), manually remove the crosshairs or let Batocera decide for you.

The Wiimote works by sending a video feed of its IR camera to the machine. This sensor is very poor, and can fail to see the IR LED if too far away. So, there's a “sweet spot” for each display where you are both far enough away to see the IR bar when aiming at the extreme corner opposite the IR bar, while still being close enough for the IR camera of the Wiimote to pick it up.

To debug this to get an accurate reading, connect via SSH and run the following:

xwiishow 1

This will show a video feed of the IR camera in the upper-right of the SSH session:

To visualize what this information represents, imagine this being a flipped version of the position being aimed at on the display:

Make sure there are no reflective surfaces or other obstructions that can interfere with the visual. If placing the LED on a flat surface like the top of the entertainment unit, ensure it is as close to the edge as possible to make sure it's not obscured by its edge when aiming from a lower position (you may want to prop up the IR bar on some rubber stoppers).

First, ensure you are running Batocera v35 or higher.

Otherwise, ensure that CONTROLLER & BLUETOOTH SETTINGS → WIIMOTE GUN SETTINGS → MODE and set it to “GUN”.

Replug the light gun or change recoil settings.

Avoid using a USB hub when connecting both guns. Use different USB speed port for each (ex.: USB 2.0/USB 3.0) or different pair (ex.: one in front of the PC, one in the back). If using a Raspberry Pi, make sure you have enough power voltage.

A reboot might be necessary if hot plugged in.

RPi4: Plug your first sinden in USB3 port. Wait 10s. Plug your second sinden in USB2 port. Wait 10s.

You need a good amount of power voltage too.

Steam Deck dock: Most issues are fixed with a good quality SDCard and the official Steam Deck dock with good amount of power voltage.

Later Sinden Lightgun models (currently fixed in Batocera v40) There actually is a known issue with later models cameras. If you bought in mid-2023 and later, you might encounter this issue even if it works fine on Windows.

Open the file manager (F1) or connect with SSH and navigate to /var/log/ folder. There, you should see virtual-sindenlightgun* file logs. Open it and if you see this :

Or this :

You might need to update your camera name by following the the guide here (.PDF).

If you are on Batocera v40+, make sure Disable Joystick mode is clicked when flashing firmware on Windows (v1.09 and above).

If you tried to flash your light gun from linux itself or Steam OS, you must downgrade to 1.08 or 1.03 and upgrade again.

Some games offer a recalibration menu in-game. Use that to work around such issues. This will be different per-game of course.

Arcade games typically require the use of the service menu, refer to the exceptions section above.

Check out the mega-issue report, it's probably already been reported.

If having issues with ROM loading itself, check out the generic troubleshooting page.