Protect the tower at all cost and eliminate everyone that tries to bring it down. This miniclip game is very realistic and you can even see the earth tremble with the power of every shot. Enemies will be coming at you on both sides of the screen s you need to have fast reflexes in order to anticipate their movement. Use the mouse to aim and shoot. Some enemies are easier to kill than others. Some carry with them unique weapons that may inflict considerable damage to the tower so keep an eye out for those. Upgrades are available after a level which can give you the edge when fighting. Use the r button to reload and z to call on airstrike if you have any.