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Koikatsu and Koikatsu Sunshine

My system specs:
AMD Ryzen 7 5700X
AMD Radeon RX 7600
32GB DDR4 3200
WINE 8.21

Installation

required pacakges: wine winetricks

• Create a new WINE prefix (optional)
• install dxvk and fonts with winetricks allfonts dxvk ole32
• Install the game Note: You may need to run the installer with a Japanese locale. Please refer to your distros documentation on how to set up locales. to do this set the LANG enviroment variable as LANG=ja_JP.UTF-8 and then run the Setup file.
• Install any updates you have for the game or install the HF-Patch (for modding and easy updating)

Setup & Running

If you’re running a modded game using HF-Patch and BepinEx add this registry key:
wine reg add "HKEY_CURRENT_USER\Software\Wine\DllOverrides" /v winhttp /t reg_sz /d native,builtin /f
Disable WPF hardware acceleration to prevent graphical glitches with launchers, dnspy:
wine reg add "HKEY_CURRENT_USER\SOFTWARE\Microsoft\Avalon.Graphics" /v DisableHWAcceleration /t REG_DWORD /d 1 /f
Prevent mouse focus loss issues:
wine reg ADD 'HKEY_CURRENT_USER\Software\Wine\X11 Driver' /v UseTakeFocus /d 'N' /f