Defensoid is described as 'open-field style tower defense game. Create a destructive maze of upgradeable towers to destroy the evil Oids!' and is a Tower Defense Game in the Games category. There are seven games similar to Defensoid for a variety of platforms, including Android, iPhone, iPad, Android Tablet and Windows. The best alternative is Fieldrunners. It's not free, so if you're looking for a free alternative, you could try Robo Defense or HexDefense. Other Defensoid like games are Pheugo (Freemium), Radiant Defense (Freemium), Empire Defense (Freemium) and Saturn Defense (Free).
Pheugo is a crazy 3D arcade action space odyssey game where you play 1 from 11 different heroes who must run, jump and throw their way to freedom. Basically you are abducted by aliens and imprisoned in one of their maximum security plasma prison cages.
Radiant Defense is a tower defense game set in a vibrant universe invaded by countless alien hordes. Build your space fortress any way you wish, set up wide variety of weapons and traps and let the invasions begin!
Empire Defense II is based on the background of Three Kingdoms and it has been downloaded by thousands of players since the day it was released. Now, we are so glad to meet its amazing update. As creative game, Empire Defense II focuses on General developing and skill upgrading. Represent entire series of Empire Defense games.
WOW! Saturn Defense is such a cool 3D defense game! NOW Free! Get ready to DEFEND THE SATURN from the invading aliens! The most amazing full 3D tower defense game from SpiceSpin Studios! Full 3D defense battles with gorgeous space background will hook you for hours!