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 4 friv 7 friv 27 friv 47 friv 68 friv 93 friv 122 friv 140 friv 4037 friv 2016