Planet Defense 1 is another point and click strategy game created by twotowersgame. In this game, you are to protect the Earth from storms of asteroids and comets bound for the planet and save the mankind for total extinction. Utilize five different defensive weapons available in game but you must use them wisely for they don't cost cheap.
Only one type of spaceship you can use at the beginning of the game and others will be unlocked upon achieving a certain action i.e. destroying four comets will unlock the bastion weapon. Meanwhile here is a video of (PD1) Planet Defense 1 walkthrough.
