"One of the things that we're doing is we seem to be in a transition between games as a package product and games more of a service. So if you look at Team Fortress 2, one of things that's really helped grow the community is the continuous updates, where we release new maps, new character classes, new unlockables, new weapons. And we tell the stories about the characters, like the meet the sniper, or meet the sandwich. And that ongoing delivery of content really seems to grow the community.
"So each time we've released one of those for Team Fortress 2 we've seen about a 20% increase in the number of people who are playing online. And that number is really important because it determines how many community created maps there are, how many servers are running, and so on. So we'll do the same thing with Left 4 Dead where we'll have the initial release and then we'll release more movies, more characters, more weapons, unlockables, achievements, because that's the way you continue to grow a community over time."
Or we'll take those things and package them into an entirely new game instead.
