Invasion Tactical Defense - On Online-Games-Zone.com you will find tons of free online games, which you can play right in your browser. All online games are for FREE and you can play them online, so you never need to install any programs on your personal computer at home or at work. Enjoy our website and have fun.

Your mission in this turret defense game is to defend the Earth from invading UFOs. Aliens are invading our earth and it is up to you to defend an important nuclear factory. Do this by buying cannons, training new defenders and telling them what to do. You also need to make strategic decision about what cannons you buy and what upgrades you make. Use your mouse to control all aspects of the game.

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