There are 2 separate complete showstopper glitches in chapter 13. The first is in the room with all the gunk on the floor where the stalkers hunt you. There's a power cube somewhere in the ceiling that sometimes doesn't spawn at all. And another near the end where you get attacked by a brute where the hacking panel doesn't spawn. Keep 3 save slots so you can retry the area else you're going to have to replay the whole game.
*POSSIBLE SPOILERS* I've been playing this almost non stop and now the game has bugged out on me. At the very end of Chapter 13. After the Marker laser thing room, there is another large room 3 stories high, top floor you get attacked by babbies. All the way on the bottom floor you get attacked by a Brute. But once i take him down I'm locked in. The panel by the door I'm supposed to hack is bugged!
I've looked at a guide and the next save station is right behind that door. So i'd be much obliged if anyone could hook me up with a savegame!
EDIT: On a related note... Have a set of 3 saves and use them in sequence, there are several spots in the game that seem to bug out, don't make the same mistake i did and only use 1 slot :/
An OLED screen? no way in HELL. Those are absurdly expensive to make and if those were in mass production we would've heard something about it months ago! BUT, if it IS an OLED screen this PSP2 will cost upwards of 500 dollars :|