City Siege 4: Alien Siege online flash game is an action game that's very fun and engaging. As most action games City Siege 4: Alien Siege takes a bit of practice to get a hang of it and requires a little bit of skill. Use your mouse and keyboard to play City Siege 4: Alien Siege, you will be given detailed instructions and a tutorial in game.

The game is fun for all family to play, and it's a great fun little thing to play when you have some time to kill at home or office. City Siege 4: Alien Siege features nice modern flash graphics and animation effects as well as sound effects and a cool sound track. You can turn the sound off in the game, but it will be on by default so keep that in mind and adjust your speakers accordingly.

The fourth installment of the City Siege franchise and the first to be set on another planet. Arm yourself with advanced units and lazer guns and take on the evil plants from this crazy world. After all they have valuable gems we need... Oh, and there ar

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