The Duck Station games that have support for GunCon, the DefaultLG game files will put the light gun(s) into game pad mode, so multiple people can play. When the game closes, the light gun(s) go back to keyboard and mouse mode. If the game doesn't have GunCon support, then only player 1 will be set, and will stay in keyboard and mouse mode. If the light gun doesn't have game pad mode, then only one light gun can use the keyboard and mouse controls in the Duck Station emulator. So if you have a light gun with game pad mode and a light gun without game pad mode. They can be both used, as the light gun with game pad mode, will be put into game pad mode. Then the other light gun will use the keyboard and mouse controls. This is only for games that support GunCon. However, if you had 2 light guns without game pad mode, only 1 can be used. The 'settings.ini' file needs to be correctly set, for the controls to work. This is your responsibility.

For games that say needs a patch. They need the PS1 GunCon patch. Also, all games support the GunCon, unless stated otherwise.

For the GunCon patch games. I converted the CHD file to CUE/BIN files, using chdman program. Then I patched the BIN file, using the program in the PS1 GunCon conversions ZIP file. Then used the CUE/BIN files in Duck Station.

All Duck Station's Game Files

All Duck Station's DefaultLG Game Files

Nixxou's Duck Station DefaultLG Game Files

SLUS-00335 - Crypt Killer - Needs patch. Digital controller only.
SLUS-00119 - Die Hard Trilogy - Needs patch. Digital Controller - port 1 & GunCon - port 2.
SLES-00445 - Die Hard Trilogy (Europe) - Needs patch. Digital Controller - port 1 & GunCon - port 2.
SLUS-01015 - Die Hard Trilogy 2: Viva Las Vegas - Controller - port 1 & GunCon - port 2.
SLUS-00654 - Elemental Gearbolt
SLES-03990 - Extreme Ghostbusters: The Ultimate Invasion (Europe)
SCES-02543 - Ghoul Panic (Europe) - Single Shot and no recoil, used TriggerPress for recoil.
SLUS-01398 - Gunfighter: The Legend of Jesse James
SLPS-01106 - Guntu: Western Front June, 1944 - Tetsu no Kioku - No recoil support, use TriggerPress with Recoil_R2S. Recoils with no ammo.
SLUS-00630 - Judge Dredd - Digital Controller Only
SLUS-00293 - Lethal Enforcer I & II - Needs patch. Digital Controller Only
SLES-00542 - Lethal Enforcer I & II (Europe) - Needs patch. Digital Controller Only
SLUS-00503 - Maximum Force
SLES-02244 - Mighty Hits Special - No recoil support, use TriggerPress.
SLES-03846 - Moorhen 3: Chicken Chase - No recoil support, use TriggerPress. Shots when no ammo.
SLES-03278 - Moorhuhn 2: Die Jagd Geht Weiter - No recoil support, use TriggerPress. Shots when no ammo.
SLES-04174 - Moorhuhn X - No recoil support, use TriggerPress. Shots when no ammo.
SLUS-00481 - Point Blank
SLUS-00796 - Point Blank 2 - Recoil starting working 2nd load.
SLUS-01354 - Point Blank 3
SLPM-86048 - Policenauts (Disc 1) - Need patch. Didn't play, too long to get to shooting.
SLPM-86049 - Policenauts (Disc 2) - Need patch. Didn't play, too long to get to shooting.
SCUS-94408 - Project: Horned Owl - Needs patch. First time Recoil Didn't work, But Good After
SCPS-10016 - Project: Horned Owl (Japan) - Needs patch.
HASH-2A8EE8AAA2279639 - Project: Horned Owl (Japan, Hash) - Needs patch.
SCES-02569 - Rescue Shot (Europe) - Single Shot, so used TriggerPress for recoil, as no recoil support.
SLUS-01087 - Resident Evil: Survivor - Needs patch. Only P1 Light Gun
SLES-02732 - Resident Evil: Survivor (Europe) - Only P1 Light Gun
SLES-02744 - Resident Evil: Survivor (France) - Only P1 Light Gun
SLPS-02474 - Simple 1500 Series Vol. 24: The Gun Shooting - No recoil support, use TriggerPress. Recoils when out of ammo.
SLPM-86816 - Simple 1500 Series Vol. 63: The Gun Shooting 2 - No recoil support, use TriggerPress. Recoils when out of ammo.
SLUS-00381 - Star Wars: Rebel Assault II - The Hidden Empire (Disc 1) Needs patch. Light gun on 2nd port.
SLUS-00386 - Star Wars: Rebel Assault II - The Hidden Empire (Disc 2) Needs patch. Light gun on 2nd port.
SLUS-00405 - Time Crisis
SLUS-01336 - Time Crisis - Project Titan

Spreadsheet

Duck Station's DefaultLG Game Files Spreadsheet - ODS Format
Duck Station's DefaultLG Game Files Spreadsheet - XLSX Format