Unfortunately due to someone's epic fucktardness, PS3 users atm cannot login to play online. Grrrr!
Anyway, the main story is about 5 hours long (I did it in 5 hours on the dot, somehow). It one of the most quickly paced, action backed, mind provoking campaign I have ever played. There is not a dull moment. Never been so glued to a campaign mode! The story is genuinely interesting, unlike COD4, where you just skipped everything, because most FPS shooters have nonsensical story line, simply because no one watches them... well this is definitely a refreshing change.
When you finish, you can play Spec Ops mode, which features some missions which have to be played with 2 players (via internet or splitscreen or LAN). These are like little missions from the best parts of the story mode. I just attempted a Spec Ops mission which see's you return to Chernobyl in that ghillie suite, I got mauled by dogs.
... Still waiting to try online though
