Our friends of XONA GAMES just released Decimation X on Xbox Live Indie Games. It’s a great Space Invaders clone with an awesome upgrade system and up to 4 player co-op. And the best its only 1$! GO get it now on the Xbox Live Marketplace 
My highscore right now is 628.000 after the second day but Matthew and Jason (the devs) have over 1.8 million so still some room to improve 
. Decimation X is currently best rated game and best selling game on XBLIG in Japan.
You can also read more and watch a trailer over at gamesetwatch.com and technabob.com
