Microsoft today announced that Konami's Contra will be on the Xbox Live Arcade this Wednesday, available worldwide for just 400 Microsoft Points. In related news, Microsoft also announced that beginning in January 2007, Atari will release six titles on Xbox Live Arcade throughout the year. Classic and evolved versions of Centipede/Millipede, Battlezone, Asteroids/Asteroids Deluxe, Missile Command, Tempest and Warlords will be available for each of the titles.