Released in late 2008, PES 2009 was celebrated for introducing several features that defined the series for years:
If you are running the game on Windows 10 or 11, you may need to use "Compatibility Mode" (right-click the game icon > Properties > Compatibility > Run this program in compatibility mode for Windows XP or Windows 7) to ensure it runs correctly on modern hardware.
Finding a legal digital copy of PES 2009 for PC is challenging because it has been delisted from modern storefronts like Steam due to expired licenses (licenses for players, teams, and music usually last only a few years).