Earth Defense Force

You can see in the Android, a tower defense game fantastic.
Tower Defense is a strategy game that was developed newly by adding an element of shooting fun and games of the defense the original game.
Create a distinctive turret plus a more powerful base.

Alien creatures who have invaded the Earth.
Earth Defense Force newly created to defend the Earth.
Try to defend the Earth from enemies coming endlessly pushed base.
Depends on the fate of the Earth is at your fingertips.