Microsoft, at its conference, announced Galaga Legions, a remake of the legendary arcade shooter. The game features upgraded graphics, new enemies and more. It will be released via Xbox Live Arcade later this year.

The company also announced Geometry Wars: Retro Evolved 2, the sequel to the highly addictive shooter. It will include six gameplay modes, new enemies, scoring strategies and a bunch of new Achievements. The game will also support multiplayer for up to four players, with versus or co-op modes, and 1080p graphics, along with new music. It is set to hit Xbox Live Arcade next month.

Finally, a new South Park game is also in development, though it is not expected until 2009.

• “South Park” (South Park Digital Studios/Doublesix/Microsoft). Based on the Emmy- and Peabody-award winning show, a “South Park” game (title TBA) is coming exclusively to Xbox LIVE Arcade in 2009.