Click on the empty tiles to the left to construct buildings, use them to defend your base from enemy and to produce units to attack them. All structures are upgradeable, which makes either them or units they produce more powerful.
Temple Guardian returns with larger maps and more features like auto save. Build defense towers, market, academy and hire heroes to defend the Sacred Temple of Lightning and Fire.
Defend the Earth from invading UFOs. Aliens are invading our earth and it is up to you to defend an important nuclear factory. Buy cannons, train new defenders and tell them what to do.