Alien Base is a set of 4 double-sided tiles. On one side of each tile, you have a picture of a fragment of a base. If you put these tiles face down, they together form a big alien base. On the other side of each tile, there is an alien threat you must fight. Spyware threat blocks your technology cards, Alien contamination threat blocks your ships and Mysterious plague will affect your planets… With this promo in game players have a choice – instead of attacking Alien system card, they may attack Alien Base, choose one of the tiles, flip it face up and fight it. You never know which part of the base you will have to deal with. They are a mystery. They are a risk. They are a threat! But the award is there. On score 2, 3, or 4 you will gain Victory Point. Save humanity. Fight Alien Base.