If you're a fan of tower defense, check out this AppGuide.

Your favorite tower defense game has been updated and given a holiday twist.

Anomaly Warzone Earth is a tower defense game with a twist. Instead of defending your towers as waves of enemies attack, you are the wave, sent to take back the city from invading alien forces. Technically, it is a tower offense game. Sit back and enjoy the ride as you attack turrets and rescue survivors in this high quality graphics, action game.

AppAdvice has teamed up with Infinite Dreams in order to offer you a chance to win one of five promo codes for Jelly Defense for iPhone, iPod touch, and iPad.

Check out Sega's latest castle defense game which is based on Japanese legend and history. It is called Samurai Bloodshow and has been released on the App Store as a universal app. The game offers a hand-drawn style of visuals as if an old feudal Japanese scroll was brought to life.

If you enjoy physics games, puzzlers, or tower defense titles check out Cubes vs. Spheres. The universal app just received a minor update and offers innovative gameplay, a great art style with colorful visuals, and an intensive combo system. Your goal is to stop incoming waves of cubes from reaching your base by flinging spheres at them.

Want to do a good deed? Help Nichole finish her homework in Defense Craft HD: Zombies Invasion, a tower defense title with a zombie tilt for the iPad.

Zombie Resistance is a tower defense game in which you must defend your mini fortress, with guns, from the hordes of undead trying to claim it.

GoblinGun is an iPhone/iPod touch tower defense game that pits your arrows and cannons against an army of goblins, spiders and ghostly apparitions. Grab your gun and bring in the cat because waves of fantasy creatures are headed your way.

Anomaly Warzone Earth is already available on the NZ App Store and should hit your store within 24 hours. The game has great visuals and is being ported from the Mac and PC. It also gained critical success due to the mix of offensive weapons you can use to attack enemy structures.

Defend your bases against the pesky humans after you try to visit the Earth in peace.

If you enjoy real-time strategy or tower defense games, check out Bio Defense. The game has recently been updated with a set of new features and various optimizations.

A tower defense game where it's your job to hold off the hostile fleet.

Your village was destroyed by ruthless birds. As the last remaining blue pig, you must seek revenge!

If you enjoy tower-defense games with great 3D graphics, check out War Grimoire. The game offers the ability to hire units and drag them onto the battlefield to repel enemies. You can even choose from 60 different weapons at your disposal and they can be upgraded later as well.

A new take on tower defense comes from developer Bulkypix with their latest game, Hills of Glory: WWII. The latest title changes the formula by taking the action into the WWII theater of operations. You will have direct control of much of the action and can even call in air strikes.

Foursaken Media has recently updated their game, Bug Heroes, bringing the current version to 2.2. With the update a new hero-bug was added; the praying mantis. The game mixes a few genres together, most notably dual-stick shooting and tower-defense.

The iPhone tower defense game Holy Moly Dragons, has recently been updated. This 2.0 update adds two new levels called Murky Waters and Shattered Temple. The game is fun and colorful; taking place in a fantasy world with dragons.

A recently released innovative tower defense game, A Knights Dawn, has just been updated to version 1.001. The game offers a fantasy-medieval take on the genre with enemies coming up stairways from multiple levels.

A recent update to Sentinel 3: Homeworld has added a whole new campaign to the sci-fi tower defense game. Along with this 1.2.5 update the game has had its price slashed. The update adds a whole new campaign available as an in-app purchase among other features.

Ash Needs your help defending Lord Arthur's castle from the undead in Army of Darkness Defense for iPhone and Army of Darkness Defense HD for iPad. As you help him defend the castle you will also be commanding an army of soldiers and upgrading the castle's defenses with gold you've collected.

On5 Games is at work on a mysterious iOS title and has just released some screenshots. The studio is also the developer of Lemmings-like line-drawing game TipTop.

A new kind of castle defense comes to the iPad and iPhone. Defender of Diosa adds more interactivity and tactics to the genre, like being able to attack from the rear on advancing troops.

If you are a fan of tower defense or hack 'n slash games you should be in for a treat. Chillingo is releasing a hybrid title called Vampire Rush with an iPad HD and standard version.