Hmm, there are quite a few games I've played that update pretty frequently, anywhere from every 2 weeks to every 2-3 months. Of course there are quite a few that update every 6 months to a year, but those are usually the games with massive updates with animations, sound, and a bunch of features. Desert Stalker is probably the best when it comes to super high quality games with frequent updates, but I certainly haven't had problems finding games I enjoy with really frequent updates, you probably just aren't playing many.