It seems like people in Asia who have mod-chips installed in their PS2s are having difficulty playing GT4. People who have first generation (launch date) PS2 usually do not have problem playing GT4 if their PS2s don't have mod-chips in them. On the other hand, PS2s that are modified do have a hard time to recognize GT4. Of course, dirty lens or dust can both cause the reading problem. Another possible reason is that GT4 is in dual-layered format and it will cause problem to some of the older PS2s. I am very disappointed because my 30000 PS2 is installed with a mod-chip and I know I have made a mistake to install one into my PS2. 👎 I never play any pirate games because I buy only the original ones and right now I can only wait until my Japanese version of GT4 to arrive so that I can test it to see if it will work or not... So far, my Japanese PS2 hasn't given me any DRE. Except at the beginning it usually takes a long time to load the game. Once the game has been loaded, it plays perfectly fine. Please let me play this game! I really want it to work.