High Quality Content by WIKIPEDIA articles! PCSX2 is a PlayStation 2 (PS2) emulator for the Microsoft Windows and Linux operating systems. With the most recent versions, many PS2 games are playable (although speed limitations have made play-to-completion tests for many games impractical), and several games are claimed to have full functionality. The main bottleneck in PS2 emulation is emulating the multi-core PS2 on PC x86 architecture. Although each CPU can be emulated well, getting the synchronization and timing between them to be accurate is very difficult.