An ISO file is typically an image file that contains the contents of an optical disc, such as a CD or DVD. For PS2 games, an ISO file could be used to play the game on a computer using an emulator or to create a backup copy of the game.
If you have misplaced your disc but own a license, some archival sites host PS2 ISOs. Proceed with extreme caution. Many sites are laden with malware, fake “exe” files, and pop-up ads. Here are indicators of a safe source:
Solid Roster of Teams: From Prime Messi at Barcelona to the dominance of Inter Milan, the 2009-2010 rosters are a "Who's Who" of football legends. Why Fans Still Download the PES 2010 ISO
Special Editions: Modders have created specific ISO versions for major tournaments, such as the Rivals World Cup 2010 and Brazukas, which focuses on South American leagues.