For Nixxou’s PCSX2 emulator uses the games that have GunCon 2 support. There is 2 solutions to get 2 player to work. The first is to have both light guns in game pad mode. The second is to have one light gun in mouse and keyboard mode, and the other in game pad mode. I made all the PCSX2 DefaultLG game files put the light guns into game pad mode. If you don’t want this to happen to one or both light guns, then you must modify the DefaultLG game files. I will eventual have a program to do this automatically.

To enable GunCon2 light guns on PCSX2, click on ‘Settings’, and then click on ‘Controllers’. On the left hand side, you will see USB Port 1 (USB1) or USB Port 2 (USB2). Click on one of the USB Ports, which will change the middle window. Then click the combo box, in the top left, of the middle window, and select ‘GunCon 2’. Then read the text under ‘Pointer Setup’, as it will tell you how to set-up a Light Gun in mouse and keyboard mode, or game pad mode. For game pad mode, set the ‘Trigger’, ‘D-Pad’, and ‘Buttons’. If you want, you can try to set the ‘Relative Aiming’ in game pad mode. For me, the X-Axis was axis 6 and Y-Axis was axis 7. Then close the ‘Controller’ window, and close PCSX2. Then go into the ‘ini’ directory and open the ‘PCSX2.ini’ file in a text editor like Notepad++. Then you can go to the bottom to ‘[USB1]’ or ‘[USB2]’ and fix the ‘Relative’ settings, with the correct axis and signed. Below is what I used for my ‘[USB1]’. I am left handed, and reason why the 'D-Pad' left and right are swapped.

[USB1]
Type = guncon2
guncon2_Up = SDL-0/Hat0North
guncon2_Right = SDL-0/Hat0West
guncon2_Left = SDL-0/Hat0East
guncon2_Down = SDL-0/Hat0South
guncon2_Trigger = SDL-0/Button21
guncon2_ShootOffscreen = SDL-0/Button22
guncon2_Recalibrate = SDL-0/Button25
guncon2_A = SDL-0/Button23
guncon2_B = SDL-0/Button26
guncon2_C = SDL-0/Button24
guncon2_Start = Keyboard/Numpad0
guncon2_Select = Keyboard/Numpad1
guncon2_RelativeUp = SDL-0/-Axis7
guncon2_RelativeDown = SDL-0/+Axis7
guncon2_RelativeRight = SDL-0/+Axis6
guncon2_RelativeLeft = SDL-0/-Axis6

I made notes on how the game uses the USBs, and how they correlate to which player. Please set-up you light guns accordingly. It is your responsibility to set-up the light guns in PCSX2.

All PCSX2's DefaultLG Game Files

All PCSX2's DefaultLG Game Files

Nixxou's PCSX2 DefaultLG Game Files

SLUS-20485 - Dino Stalker (US) - P1 is on USB1
SLES-50930 - Dino Stalker (EU) - P1 is on USB1
SLES-51095 - Dino Stalker (EU - French) - P1 is on USB1
SLUS-20389 - EndGame (US) - P1 is on USB2 and P2 on USB1
SLPM-65139 - Gun Survivor 3: Dino Crisis (JP) - P1 is on USB1, Game is just Dino Stalker
CPCS-01002 - Gun Survivor 3: Dino Crisis (JP) - P1 is on USB1, Game is just Dino Stalker
SLES-52620 - GunCom 2 (EU) - P1 is on USB1 and P2 on USB2
SLES-51289 - Gunfighter 2: Jesse James (EU) - P1 is on USB2 and P2 on USB1
SLPS-25165 - Time Crisis in Gunvari Collection (JP) - P1 is on USB1 and P2 on USB2, only Time Crisis has Recoil, not on Gun Barrel
SLUS-20492 - Ninja Assault (US) - P1 is on USB1 and P2 on USB2
SLUS-20669 - Resident Evil: Dead Aim (US) - P1 is on USB1 and uses TriggerPress, so will Recoil with no Bullets
SLES-50650 - Resident Evil: Survivor 2 (EU) - P1 is on USB1
SLUS-20619 - Starsky & Hutch (US) - P1 on USB2, Light Gun on just USB1 will not Work, Has to be on USB2
SLUS-20619_P2 - Starsky & Hutch (US) - P1 on USB1 and P2 on USB2, and use P2 Light Gun. Remove '_P2' from name
SLES-51617 - Starsky & Hutch (EU) - P1 on USB2, Light Gun on just USB1 will not Work, Has to be on USB2
SLES-51617_P2 - Starsky & Hutch (EU) - P1 on USB1 and P2 on USB2, and use P2 Light Gun. Remove '_P2' from name
SLUS-20219 - Time Crisis 2 (US) - P1 is on USB1 and P2 on USB2, Double Gun doesn't Work
SCES-50300 - Time Crisis 2 (EU) - P1 is on USB1 and P2 on USB2, Double Gun doesn't Work
SLUS-20645 - Time Crisis 3 (US) - P1 is on USB1 and P2 on USB2
SCES-51844 - Time Crisis 3 (EU) - P1 is on USB1 and P2 on USB2
SLUS-20927 - Time Crisis: Crisis Zone (US) - P1 is on USB1 and Extra Gun on USB2, Double Gun Works!
SLUS-20221 - Vampire Night (US) - P1 is on USB1 and P2 on USB2, USB2 cannot be Plugged in until Calibration is Complete Link
SLES-51229 - Virtua Cop: Elite Edition (EU) - P1 is on USB1 and P2 on USB2

Spreadsheet

PCSX2's DefaultLG Game Files Spreadsheet - ODS Format
PCSX2's DefaultLG Game Files Spreadsheet - XLSX Format