Half-Life / Counterstrike
Business 2.0 - Magazine Article - Game Development à la Mod: "We've actually sold more of the overall Half-Life family of products each year since we shipped back in 1998, which is very unusual in a market typified by three-month shelf lives," Newell says. Half-Life was a great game, but what has kept it going is the community that sprung up around the mods (add-ons) that are out there. I'm still waiting for Team Fortress II. Will that ever see the light of day?