Video games often get accused of encouraging brainlessness. They're usually comprised of a lot of shooting and jumping around, so they aren't exactly mentally stimulating. Those that are tend to get lumped into the dreaded "educational game" category that, at best, has included titles like Math Blasters and a few in that small group of games marketed toward people who traditionally don't like video games in the first place, i.e. games designed with mental or physical fitness in mind. There's something to be said for the ability of browser games to plug into the entertainment potential of thinking. October had some good brain games for free play on the Internet. Here are a few of the best.