(Released June 14, 2004)This first add-on introduced five new missions set one year after the initial invasion. As aliens began capturing massive portions of Earth's surface, the player was tasked with entering a secret research center to retrieve a virus capable of saving humanity.
(Released September 22, 2004)The second expansion further escalated the stakes. With half of Earth under alien control, the remaining survivors retreated to fortified zones. This chapter introduced a new race of monsters created by Earth's scientists to combat the invaders, adding five more mission-based levels to the campaign. Mechanics and Atmosphere Download Alien Shooter EXPANSIONS PC GAME 2003
In 2004, Sigma Team released two critical expansion packs that extended the challenge and concluded the story of the first game: (Released June 14, 2004)This first add-on introduced five