free pc game Master of Defense (download demo version, buy full version)

Defend your citizens from monsters!

In this real-time strategy game, you are tasked with building towers to defend your citizens. As you progress, you'll be able to upgrade or build new towers with the gold you've earned and add on special abilities through skill points you've accumulated. Choose your defense carefully to keep your citizens protected! If even one monster gets past your guard, it could spell certain doom for your entire city.
Download Master of Defense now and start playing right away!