Siliconera is reporting that a demo of the upcoming Raiden Fighters Aces has appeared on the Japanese Xbox Live Marketplace. For those unfamiliar with the Raiden Fighters series, the games are vertical shooters with all the vertical shooter standbys, like power-ups, several different types of ships, and two player co-op. The series itself is an offshoot of the more well known Raiden series, and the final game will include Raiden Fighters, Raiden Fighters 2, and Raiden Fighters Jet. The game is currently set for release in Japan only for the Xbox 360 on March 27. Fans of the series should be excited, since compilations like Raiden Fighters Aces are uncommon, considering the last Raiden compilation came out in 1995.