Which one? Please, oh my freaking god please, say SPOILER ALERT!!! I swear to god, this is one game I care about not messing up the storyline.
So, the first took a few days (first time round of course), second took about 3 days, 3'rd took like a week. Never played VR training (retail), but played the demo. Never played AC!D b/c I don't have a PSP and don't care about it. Never played PO for the same reason. Played the first part of four, but thats it.