When you run ePSXe 2.0.5 on your PC, the emulator replicates the PlayStation’s hardware. However, it does not legally include Sony’s proprietary BIOS code. Therefore, you must provide a from a legitimate PlayStation console. Without a BIOS file, ePSXe 2.0.5 will either refuse to run games or will attempt to use a built-in, incomplete emulation method (HLE – High Level Emulation), which often leads to graphical glitches, missing sound effects, or game crashes.