Robo Defense is described as 'is the ultimate portable tower defense experience. Featuring open maps, upgrades, achievements and nice graphics' and is a Tower Defense Game in the Games category. There are more than 25 games similar to Robo Defense for a variety of platforms, including Android, iPhone, iPad, Android Tablet and Windows. The best alternative is Plants vs Zombies, which is free. Other Robo Defense like games are Kingdom Rush (Paid), Clash of Clans (Freemium), Bloons TD (Paid) and Fieldrunners (Paid).
Plants vs. Zombies is a tower defense video game by PopCap. A mob of fun-loving zombies is about to invade your home, and your only defense is an arsenal of zombie-zapping plants. Represent entire series of Plants vs Zombies games.
It's time, once again to achieve total Bloon popping satisfaction, this time in the form of classic TD. With an army of dart monkeys and a multitude of towers and weapons at your disposal can you pop all the bloons before they escape? Represent entire series of Bloons TD games.
Tower Duel is a Multiplayer Tower Defense Game for iOS and Android. Compete with your custom built Deck in ranked online matches. Place Towers to create a maze, while sending Attack-waves to overcome your opponents Defense.
GHERHART is an awesome tower defense game, game in which you have to manage your resources well so as not to lose your castle. To move to the next level, the gold-collecting troops must reach the sphere 30 times.
Tower Madness is an epic 3D tower defense game for iOS. Evil aliens are coming to turn your beloved sheep into intergalactic scarves-- you must protect the flock using only quick thinking and the arsenal of upgradeable weaponry at your disposal.