Protect your communication tower against the enemy air strike. The earlier you take down enemy planes the more money you will get! You can buy or upgrade weapons for earned money and try to keep your tower safe as long as possible.
Your forces were out on a routine patrol and the undead were suddenly everywhere! Your forces were badly depleted in the conflict thus you must continue to do your job and keep the undead population under control until a solution can be found.
The nano robot called Antidote must protect human body from the attacks of various viruses. Try different combination of weapons to find out what works best for each level. Humanity needs your help!
Shoot the incoming enemies to protect your base. Collect weapons and turrets that automatically fire on the incoming missiles. Push the turrets around the battlefield to take advantage of their range and abilities.