BTW, re: online patching -- I don't have the PS3 hooked up to the internet, so I played through it without them, so it's possible, but... it's really buggy.
In certain circumstances the games it will fade to black after a scene (like normal) -- but never actually loads the next scene; it just
stops, and that's it, you need to quit and restart from the previous checkpoint.
Sometimes certain controls just stop working. E.g., in the train station, all you have to do at first is walk across the room, but when I first tried it, the movement controls had absolutely no effect; I initially thought this was some sort of clever way of showing how scared your character is, but I eventually realized that "oh, it's just a bug". Restarting and trying again fixed the problem. Another time I had completed one of the "tasks", and was sitting upside down in a burning car, and the game was prompting me with (essentially) "press X to pick up your prize" -- but the X button didn't work, no matter how often I pressed it! So eventually I just gave up and failed that task.
The bugs aren't "fatal" in a "you must restart the entire game and play from the beginning" way, but they can be extremely frustrating and can definitely screw up your result.