Eurogamer: Is there more DLC in the pipeline after this pack?
Mark Rubin: We can't say anything right now. To some extent we don't know for sure - the team is concentrating on getting this map pack out for every platform.
Eurogamer: When's it releasing?
Mark Rubin: Sometime in April.
Eurogamer: And when are you making an announcement on pricing?
Mark Rubin: It should be really soon. I don't know for sure.
Eurogamer: What are your expectations for the event today?
Mark Rubin: The event here in London is great because this is the only event for the map pack. There isn't really another press event. We based it in Europe and I hope that sends a message that we really pay attention to the European community and love it, and don't segregate them off for any reason. They are a big part of our fan-base.
Eurogamer: Has the popularity of the game exceeded your expectations?
Mark Rubin: Yeah, it was a huge surprise. When we were making the game, we had no idea how popular it would be. It was a tough time, there were a lot of big titles coming out and we were going up against the behemoths of the industry. We had no idea where we would end up, but we've been on top of the online play counts for weeks now.
Eurogamer: How many people are playing online?
Mark Rubin: Every day we get a unique user count, how many played that day. We have been consistently for the past two-to-three months been between 1.2 and 1.3 million every day [on Xbox Live]. Monday through Sunday. It's crazy. We've created a lot of heartache for a lot of companies who go up against it. I think Halo's website says they get something around 845,000 to a million. That's just 360. There's even more on the other platforms, but we just don't have the same numbering system. Overall, even without the other consoles, we are beating the competition. PS3 numbers are monstrously huge. No other game has come close, either online current, or total unique users in a day.
Eurogamer: Of the people who bought Call of Duty 4, how many are playing the game online?
Mark Rubin: I don't have an exact number for you, but it turns out to be a startling number of people. For a lot this is there first time playing a multiplayer game on console or PC. We're getting really high numbers.
Eurogamer: Finally, have you considered doing any single-player DLC?
Mark Rubin: We think of everything, but not really in that case. We feel like the single-player campaign was the perfect story, it began and ended correctly, and don't think there's anything we could do with that.
Call of Duty 4: Modern Warfare is out now on PS3, Xbox 360, PC and DS.