【實用街機app】Protect Earth|最夯免費app-綠色工廠好玩App

Protecting Earth from invaders might not be as easy as it seems... At first the weakest and slowest invaders will try to attack, but eventually harder, faster, and more intelligent aliens will attempt to invade. It is your job to protect earth for as long as possible from those horrendous creatures. Stop them at all costs.