Description: City Siege 4: Alien Siege is the fourth installment of the popular, fun-addicting shooting game. You are on a mission on a far away planet. Take your awesome laser gun and build upgradeable troops in order to battle all enemy alien units and rescue the la Tags: friv 1 friv 18 friv 43 friv 61 friv 69 friv 100 friv 147 friv 138 friv 4129 friv 2016