So... I bought the game yesterday via steam... it spent 7-8 hours downloading and installing... I wait all this time, start it up... go through the beginning cinimatics... First look at the game, I hear people's voices, but I see no people around me. I go through a corridoor, see some explosions, there's no way out. I sit next to a sideways hatch, to the left of which is a horizontal ladder extending away from me in a tube... I hear the same guy yelling "Come on! Move! Move!" every 10 seconds or something, yet I never see him. I can't seem to find a reliable walkthrough for the first level... it's stupid, I feel like a noob, but I beat both the previous Crysis games no problem. Wtf is up with this one?

If someone could provide assistance as to why this is happening, I'd be ENORMOUSLY appreciative. Because I've been waiting for this game for months, and stared at a steam downloading screen for approximately 7 hours...

[Edit]: If anyone else recieves this issue, and is using steam, verify the game cache and run steam's defrag. That fixed it for me.