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 last human survivors. Your task is to kill all the hostiles and save all the civilians, do you think you can do that?
Upgrade your alien by buying airstrike, napalm, medic and other helpful tools and weapons. Lead the intergalactic task force to retrieve your peeps. The planet happens to have a rich mineral wealth, so try to liberate some of that while you are there as well. Collect all gems and earn money to complete each mission. Have fun with this fourth sequel of City Siege, online and for free on Silvergames.com!
Controls: Arrows / WASD = Move, Mouse = Aim / Shoot