OPL is unique because it supports three distinct ways to play your games. Your experience will vary heavily depending on which method you choose:
Modern versions of OPL, such as the 1.2.0 beta builds, have significantly expanded what the classic console can do: Open PS2 Loader (OPL) - ConsoleMods Wiki open ps2 loader (opl)
The PS2’s IOP (Input/Output Processor) is essentially a modified PS1 CPU. OPL patches the IOP’s CD/DVD driver routines in memory to redirect reads to Ethernet, USB, or HDD — all while keeping game code untouched. That’s why compatibility is so high (~90–95% of the library). OPL is unique because it supports three distinct