One year passed since aliens invaded planet Earth. These monsters have captured large districts of the Earth surface, and now all the humanity arises against them. Among secret government research projects there's a virus which can help people survive and avoid total annihilation. You must get into the secret research-and-development center and save the virus. Yes, save the virus, because it's in danger now... In the new part of the game: - 5 new missions, put together in a plot line - vivid prehistory - even larger crowds of monsters to wipe out before you reach the goal.