Tri Synergy and Cenega Publishing announced today that UFO: Aftershock to North American retailers. The game developed by ALTAR Interactive follows directly from one of the endings of the first title, where the player agrees to hand over the Earth to the Alien scientists, who are trying to change the planet into a giant living organism. The Council of Earth and their followers take refuge on an orbiting satellite prepared for them by the aliens, but not all the survivors of the original invasion where re-located. A playable demo can be found here.