Place monster towers on the field, to defend against the invaders. Collect energy by destroying the ball invaders. Use energy to purchase more monsters. Don't let the invaders reach your base! Features - Interactive tutorial - Fun, upbeat theme - 18 large, challenging levels - A variety of monsters are unlocked as you progress. Use them strategically to win each level Enter to be happy playing Monster Tower Defense game with no fees at friv20.org. Come to enjoy Monster Tower Defense game now and the latest Friv 20 games online for free.

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