From gamerstemple.com: Of all of the remixed Space Invaders games I've played over the past couple of years, Infinity Gene is probably my least favorite. Turning the game into a shmup was a pretty good idea, but the end result is a game that's a bit below average for the genre. It provides some entertainment for a short while, but not enough to inspire me to keep coming back to it. The evolving ship and game rules should have been compelling enough to keep me playing, but the gameplay itself wasn't thrilling enough to motivate me to keep playing it just to see what upgrade would come next. The game's fusion of genres doesn't quite gel into a compelling enough game to recommend it to Space Invaders or shmup fans, so if you're in either of those groups I'd advise you try the demo first before you commit your Microsoft Points to it.