Aliens have been abducting humans from Earth for as long as rednecks can remember. Now it is time for NASA and some private security service teams to work together to bring these civilians back home. Upgrade your troops with various different attributes and then send your men into battle. You will control the guys you send in and you will need to shoot down the alien guards and collect the jewels that break off their suits. Break the humans free from the planets that seem to be trying to drain their life force.. but maybe their keeping them alive? After all you are wearing a spacesuit to keep breathing oxygen so this is quite a dilemma. Don't worry about the details because they frankly don't add up, just shoot and save the hostages. City Siege 4 Alien Siege is one of our many Action Games that we publish on TheGamerStop.com. This game is also tagged as a City Siege game. Click the play button to start having fun. To play even more free games, view our popular and new games page. If you want to play more games like this, then you can simply check out the games inside the game tags that are the most relevant to your interests or the Action Games category or the games like this game page at the end of the game tags.