Fix — Koikatsu Crash

You double-click the exe, the window opens, and then... nothing. The screen stays black or closes after 2 seconds.

Outdated graphics drivers are a common cause of game crashes. Ensure your graphics card drivers are up to date. You can check for updates on the official websites of NVIDIA or AMD, depending on your graphics card. koikatsu crash fix

BepInEx is the mod loader. If it crashes during boot, the game dies. You double-click the exe, the window opens, and then

The original Japanese version of the game requires the system to be in Japanese locale to function correctly. While the Steam release (Koikatsu Party) handles this better, modded versions often still rely on it. Outdated graphics drivers are a common cause of game crashes

Sometimes, the game's settings might be too high for your system to handle, leading to crashes. Try lowering the graphics settings in-game to see if that resolves the issue.