The Sims 3 is now on Steam, bringing interactive soap operas, dysfunctional families and suburban nudist colonies to your Steam account. The game's many expansion packs are also on Valve's digital download service, including World Adventures, which lets you take your sims treasure hunting in exotic and often booby-trapped locations, and Late Night, which lets you take your sims out on the town. There's also a bundle deal offering the Sims 3 and all five expansions for half price. I'm off to build my sims a glorious mansion, and then delete all the doors and watch the carnage unfold.