The House of The Dead 4: Widescreen with correct aspect ratio (RPCS3- 980 Ti, i7 6700k)

The original Sega Lindbergh arcade version had two modes: Regular 4:3 aspect ratio mode and a wide aspect ratio mode. The wide aspect ratio mode was in 5:3 instead of your typical 16:9 aspect ratio, the rendering resolution was 1280x768 [not 720].
The Ps3 port in it's widescreen mode actually stretched the 5:3 image to 16:9, giving it a slightly stretched look. To have correct aspect ratio, you have to scale the game to any 5:3 aspect ratio resolution.
Also, the widescreen mode is actually inferior because it's vertically cropped from the 4:3 mode instead of gaining more FOV horizontally.

[@PotatoFighting]

how to shake your gun ?

[@RiasatSalminSami]

If you have dual shock 3/ dual shock 4/ any gamepad with gyro+ dinput then you can use gyro shake via gamepad. If you don't have such gamepad, then reWASD can fake gyro shake to keyboard and other gamepads.