City Siege 4: Alien Siege

Play City Siege 4: Alien Siege, the best free online arcade game! Life on alien planets can be hostile, but as the commander of space troopers, you have what it takes to deal with it. Head the missions, upgrade your weapons, and enroll your troops. Take down the aliens while they're not watching and save all the hostages from extraterrestrial plants. Be careful though, some plants are explosive! Shooting the bomb plants can help you defeat the aliens and uncover valuable minerals. But remember to keep your distance, as the explosion can harm you too. Rescue the hostages and collect resources to earn all three stars. Experience this thrilling arcade shooter game online for free. Don't forget to check out other shooter games from the series on our site, available on both mobile and desktop versions.