360 gamers can enjoy free multiplayer on titles that support cross platform play until the system update this fall.
Condemned 2, Viking and SEGA Superstar Tennis also dated.
SEGA outlines releases set for 2008.
PC version set to launch in January across Europe.
SEGA is looking for RTS players to sign up to the imminent Universe at War beta test.
SEGA's upcoming RTS to feature cross-platform play using Microsoft's LIVE service.
SEGA has announced that its in-development PC RTS Universe at War: Earth Assault is also coming to the Xbox 360.