Sega has unleashed a new teaser trailer for Universe at War, the upcoming cross-platform PC and Xbox 360 RTS game. We have plenty of weapons flying, menacing aliens of the walking on stilts variety, green lasers, and nothing remotely resembling gameplay, which gives the whole affair a sort of generic feel. I'd daresay you could call this a teaser trailer for any game involving earth being overrun by aliens and folks will believe. I want to believe.