[BUG]: Japanese Virtua Cop Re-Birth (SLPM-62205) has incorrect GunCon 2 calibration, while PAL version works correctly

[japanuser01]

Describe the Bug

In Virtua Cop Re-Birth (Japanese version, SLPM-62205), GunCon 2 aiming is incorrectly offset and calibration does not function properly.

When attempting calibration, aiming at the center target and pressing the trigger does not correct the crosshair position. The crosshair remains consistently offset toward the upper-left direction and does not move even after calibration input.

This issue does not occur in other GunCon 2 compatible games such as Dino Crisis, Resident Evil Survivor 3, and Vampire Night, where aiming and calibration work correctly.

Additionally, the PAL version of Virtua Cop Re-Birth (SLES-51229 / Elite Edition) works correctly under the same setup.

Reproduction Steps

Start PCSX2 (latest nightly build)
Load Virtua Cop Re-Birth (SLPM-62205)
Use USB GunCon 2 as the input device
Start a game or enter calibration screen
Aim at the center target when prompted
Press trigger to calibrate
Observe that the crosshair does not align and remains offset toward the upper-left
Repeat in gameplay — aiming remains consistently offset and cannot be corrected

Expected Behavior

No response

PCSX2 Revision

v2.7.444

Operating System

Windows 11

If Linux - Specify Distro

No response

CPU

AMD Ryzen 5 4500 6-Core Processor

GPU

NVIDIA GeForce RTX 4060

GS Settings

No response

Emulation Settings

No response

GS Window Screenshots

No response

Logs & Dumps

No response

[RedPanda4552]

Is this issue present in the current stable build? Or is there a specific build number where this issue first surfaced?

[japanuser01]

I had only tested the nightly build originally, so I retested the issue with both the current stable build (PCSX2 2.6.3) and the latest nightly build (2.7.454).

The issue does not occur in the stable build. GunCon 2 calibration and aiming work perfectly in PCSX2 2.6.3.

The issue has improved in the latest nightly build. Calibration now works correctly, but when starting gameplay, the shots still do not match the crosshair position. The bullets hit at an offset position, as shown in the attached image.

This behavior does not occur in the stable build, where the crosshair and shots are correctly aligned.

[japanuser01]

I retested the European version as well and found that the aiming offset issue is also present in Virtua Cop Re-Birth Elite Edition (SLES-51229).
The crosshair position is still offset from the actual aiming point, similar to the Japanese version (SLPM-62205).
This means the issue is not limited to the Japanese version and also affects the European release.