SEGA of America sent us new screenshots from Universe at War: Earth Assault, showcasing this new RTS game in the works at Petroglyph. Universe at War: Earth Assault's key feature is Tactical Dynamics, a system which allows the player to retrain and customise the units from the battle field in real time. The game will support Microsoft’s Games for Windows - Live system, making it the first third-party title to support Games for Windows - Live and enable PC vs. Xbox 360 cross-platform gaming. Universe at War: Earth Assault will be available for PC on October 30th 2007 and for Xbox360 in February 2008.