We've recently reviewed a couple of games that are only available for Vista users. Is this is a ploy to get people to use Microsoft's unpopular new operating system, we've been asked. Well, it's certainly easy to draw that conclusion.

But in fact, Vista does include a couple of technologies that aren't in older editions of Windows, which could mean that newer games using those features won't run on XP. But it's telling that the only two we've seen so far are published by Microsoft. Maybe it's only when we start to see other developers making Vista-only games that we'll be able to be sure it's not all just a sales ploy.