Flock and Puzzle Quest: Galactrix are both headed to Xbox Live Arcade this week. The bad news: They will cost you not only an arm, but also a leg to obtain. Flock clocks in at 1200, while Galactrix will set you back two Hamiltons (aka 1600). If you can live without a couple appendages -- what with computers doing everything these days, you probably can -- you can enjoy the space-faring successor to Puzzle Quest and ... erm ... a UFO-enabled herding sim. Herding is more fun than it sounds, trust us.