Forza Motorsport (the game that sells several million copies a year, that one) has a .net
That's a console game, meaning that to play it, one has to actually go out and get a DVD from a store (or maybe they have digitial purchase from within the xbox console, I'm not sure.) But either way, their primary goal as a company is to get people to buy it off the shelf when they're browsing, or to download it when they're sitting at their xbox. Therefore, their domain is not really as important compared to WarLight, where our primary goal is to get someone to type our name into their browser.
HankyPinky hit it dead on. Whenever someone asks me what the name of my game is, their reaction is usually to say "What?". The name WarLight just isn't easy to process the first time one hears it.