It's Galaga! Available right now on Xbox Live Arcade! A game sure to make gamers, non-gamers, and even the significant others of gamers very happy. Everybody loves Galaga. Grab the demo, and if you like it, Galaga can be purchased for 400 points. That's a mere $5. Seriously, when you were a kid, if someone told you that you could play all the Galaga you ever wanted for five bucks, you'd go for it right?
If by chance you have no idea what Galaga is, get the demo and experience gaming history. Otherwise, rejoice!