Planet 'World', home to many species. One day, an outer race called the 'Alien' invaded the World. Together as one, people gathered to fight back, And formed the 'STA(Stop The Alien) Union.' The future of the World is now in the palm of your hand, Commander. One-hand Operation Tower Defense! The Game of Petite Characters, 'Stop The Alien - Tower Defense' Stop the Alien Invasion! - Complete your perfect character formation! - Create the right strategy based on the alien's traits! Easy Game! Endless Grow! - Counter each stage with a unique but simple formation! - Upgrade your characters with abundant rewards! Stage, made with Fun and Gimmicks! - Challenge higher stages and stronger aliens! - Enjoy the tower defense and clear the final stage! Easy Tower Defense! Petite Tower Defense! Fun Tower Defense! Play 'Stop The Alien' the Best Tower Defense, Now!