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.
Your goal in this defense game based on StarCraft is to play as the Zerg Overmind and build up your defense and survive the combined Terran and Protoss attacks.
The aliens are back to snack on farmer brains. This time they are filled with ACID BLOOD! Look out, the acid will harm your defenses. Strategically place the crop circles to make the maze then set up your defenses and blast the aliens back to outer space.
An evil force has swept into your land. Their sole purpose is to destroy everything, and everyone in their path. Repel these beasts before all is lost. Upgrade your base, and unlock special units to clear 5 levels and claim victory.