Some folks over on the official PlayStation Forums allege to be having trouble playing God of War Collection. Several users are complaining that the game has been locking up on them, specifically after God of War's first cutscene and during the first mission. Most of the people who claim to be running into this freezing issue are running the game on 60GB launch PS3s, though a few PS3 Slim owners have also jumped into the threads to report the game is locking up on them, too.
Additionally, commenters on PlayStation.Blog have reported the same problem and specifically implicate 60GB PS3s. While we didn't experience such issues playing the final game code on a debug PS3 unit, we've contacted Sony for comment on this report and will update as necessary.