To the OP, have you played the full game or just the demo?
I got bored with the demo. I played for I think a total of 5 hours...but I probably wouldn't have played any more than that.
And it's funny, because the demo was only 1 3/4 levels of a 5 map campaign, out of 4 campaigns total.
And playing through a whole campaign is simply EPIC...the first two levels were a great taste, but the full game is simply perfect. The full game is simply WAY above what I experienced from the first two levels, so yeah.
I've played through 3 of the 4 campaigns with my friends, it took about 5 hours to get through 3 campaigns, and there's so much I didn't even get to see in each one.
And I've already got 7 hours in the Versus mode. I can't even tell how you addicting it is to play as the Infected.
LEFT4DEAD411.COM
Bet with disolitude: Left4Dead will have a higher Metacritic rating than Project Origin, 3 months after the second game's release. (hasn't been 3 months but it looks like I won :-p )