Fight back against not only enemies, but the terrors of the real world as well. In Million Dollar Tower Defense, you can spend real money to upgrade your troops which will go to charities around the world. In the game, you build towers to fight back against the enemies. Use your mouse to select the kind of towers you wise to employ. Carefully select where to place your towers with their various effects in order to best deal with the waves without any extra effort beyond initially placing them. Gain money and get upgrades for your towers in order to fight back against the boss waves.