im not sure if this has been pointed out yet or not, but at the very ending once your done the game, finished playing the new zombie map, your still sitting in the chair, STILL being asked who sent mason there, what do the number mean and whatnot, what if the series of number repeated through out the game needs to be decoded or something to fully finish the game, i feel like the game hasn't been fully finished yet their must still be more to it, expecially if you can still get out of the chair to acess the terminal, and hack it, your to hack it to find out what the numbers mean, maybe your break out of the room nd confront the person who kidnapped you in the firstplace questioning you.