The BIOS (Basic Input/Output System) is a critical component for running games on PCSX2, the most widely used PlayStation 2 emulator. It acts as the operating system of the PlayStation 2, allowing the emulator to mimic how a real PS2 functions. Without a BIOS, PCSX2 cannot boot up or run any games. When you start the emulator for the first time, it will prompt you to load a BIOS file,... https://psbios.com/which-ps2-bios-to-use/