Something has gone terribly, horribly awry at Don Eduardo's zoo. Flesh-seeking undead animals are on the loose and you, plucky boy or girl, are the last line of defense in Zoombies: Animales de la Muerte!, a mobile line-drawing defense game from High Voltage Software. Could this be the worst field trip ever?

Block Fortress is Minecraft meets tower defense meets first person shooter, all squeezed down into a mobile game. Build a base in the middle of a blocky wilderness, place turrets and towers and power supplies to fortify your position, then send in the waves of enemies. Once combat begins, you shift from building mode to combat mode, taking a gun into battle and watching over your fort by blasting enemies by hand. It's incredibly exciting and also deeply rooted in upgrades and tactics, making it the sort of game you can play for months without truly mastering.

Calling all heroes! It's up to you to defend the castles of the kingdom in Wild Heroes. In this tower defense game you must place your heroes wisely to keep the enemy at bay. Upgrade them to wild status to really do some damage. Show the monsters what a hero is really capable of!

Not sure you were aware of this, but balloons have some friends that appear to be a thorn in the side for the world's monkey population: bloons. The bloons never diminish in number no matter how many bloons-related games are released, and the air-filled fiends are still going strong in Ninjakiwi's Bloons Tower Defense 5 for iOS devices. In this tower defense strategy game, it's time for you to prove that you paid just enough attention in history class to know how to place troops but not enough to hinder your gaming expertise!

You've got a few minutes before you have to be at work. That means it's time for a game! But what to play, Pac-Man or a tower defense game? How about both? From Tametick, the creator of Cardinal Quest, comes Pakkuman's Defense, a surprisingly superb melding of the classic arcade game Pac-Man and a modern tower defense game. There are ghosts. There are dots to eat. There are towers to place. And yes, you're going to have a blast with this unusual hybrid!

The tower defense genre has been around for years, punctuated every so often by the release of a game that sets a new standard for how things should be. One of the first for the browser world was Desktop Tower Defense, and for the mobile market, an early heavy-hitter was the original Fieldrunners. Developer Subatomic Studios took a few years to do it, but the team has finally rolled out a worthy sequel with Fieldrunners 2. Expect more maps, more variety, more units, more enemies, and more rewards with this stunning release that will rewrite the way you think of the tower defense genre on iPhone.

Hey there strategy and tower defense fans! Just a little note to announce a bit of good news for iPhone and iPod Touch owners. Kingdom Rush, the so-awesome-it's-mega-awesome tower defense game from Ironhide Games, has finally made its way to small-screened iOS devices, following Kingdom Rush HD for iPad and the browser version of Kingdom Rush last year. The game stands out as one of the best defense/strategy game on the planet, capturing two awards in our Best of 2011 feature, including Best Browser Defense or Strategy game along with Game of the Year! If you haven't tried it in one of its incarnations, you owe it to yourself to correct that mistake immediately!

Your sacred grove is being desecrated! Evil spirits once again threaten the balance of a peaceful woods in Bloom Defenders, and it's up to your green thumb to stop them. This charming tower defense title by Juicy Beast has sprouted up out of your browser and is now available on your mobile device! Five varieties of tree-towers are at your disposal across 36 levels of simple, challenging strategy action.

Hexage, creator of Evac and Everlands, pits your human military prowess against endless alien swarm in this mobile tower defense game, Radiant Defense. Defense of your spiral reactor (which looks oddly like a stove burner) is the number one priority since it keeps out those pesky invaders from, you know, destroying all humans. Radiant Defense definitely keeps elements that you would always expect from the tower defense genre, but you remove the predetermined path and get the ability to create the path they will follow to their doom (hopefully). Lasers will fly, aliens will die, and the entire time your fingers will be nimbly working to hold off a rather comically bad invasion story unfold.

Don't you just hate it when a bunch of brutes, nerds, bullies, and ten feet tall Greeks show up at your party unannounced? Party Crashers Tower Defense plays on that most basic fear humans have shared since the invention of chips and dip. You've only got so much food, so it's your job to defend the party from invading party crashers!

When you hear the phrase "the best things come in small packages", you should mentally amend that to "the best things come in small cube packages". Cubemen is a no-bloat tower defense game that tries to do one thing and do that one thing well: strategy. Forget mini-games, artificially inflated campaigns, and storylines that make about as much sense as a koala flight attendant. Cubemen delivers pure, raw tower defense strategy, and it does it so well, you'll lose yourself each time you play.

New to the iPad world is the tower defense game we all love to love, Kingdom Rush HD from Ironhide Games, a port of Kingdom Rush for browsers released not too long ago. The team had a bit of a problem when an unauthorized clone appeared on the iTunes App Store weeks before release. The knockoff was spotted and eventually removed (whew), leaving space for this excellent port of an already excellent game to wow and surprise gamers in the iOS device realm!