First play through of kingdom hearts 1 for me on PS3 had all sorts of sound issues where the sound would just cut out or act like it was skipping kind of. This time thankfully it only happened once to me where the sound completely disappeared. I never personally ran into issues on 2.5 I don't think, but I never really beat any of the games on it yet. I don't think the US ever got any patches for those games but I could be wrong