I'm guessing 2 million, at the most.
The reason? MGS games sold poorly (in comparison to the PS2 offerings) on the PSP, and the PSP when MGS:PO came out had a higher userbase than the PS3 will have.
"'Casual games' are something the 'Game Industry' invented to explain away the Wii success instead of actually listening or looking at what Nintendo did. There is no 'casual strategy' from Nintendo. 'Accessible strategy', yes, but ‘casual gamers’ is just the 'Game Industry''s polite way of saying what they feel: 'retarded gamers'."
-Sean Malstrom







