Sentinel 3: Homeworld in Review – I hear you got a bug problem ma’am

In the myriad of Tower Defense titles available on the App Store, only a handful truly warrant attention. Origin8’s Sentinel: Mars Defense and the sequel Earth Defense certainly fall into this category, having been critically acclaimed by both the press and iDevice gamers. Third time’s the charm they say and with the recent release of Sentinel 3: Homeworld the developers are obviously aiming for another hit TD game.

Sentinel 3: Homeworld follows the same TD principals as the previous chapters of the series – it’s a classic fixed path Tower Defence. After holding its own on Mars and successfully defending Earth against the alien’s onslaught, mankind has traveled back to the alien homeworld to put a stop to the war once and for all.

The basics in Sentinel 3 are the same as in any other fixed-path Tower Defense – you have enemies coming in waves across one or more paths and you have to kill’em all before they reach the base. This third installment also keeps the highlights of the series: the barriers that made the original stand out and the orbital weaponry that was one of the main selling points of the sequel. And then it adds more… a lot more! First of all, instead of having all towers available at all times you actually only get a limited amount of free spots, and thus have to choose which ones to take into a specific level. Same goes for the orbital weapons. The weapons and towers themselves are unlocked as you progress through the campaign, but to get additional spots to outfit for the mission, you’ll have to spend cash earned for completing them.

The available towers feature both the beloved classic ones, like the basic gun, artillery or beam tower as well as a few new arrivals, like the laser or flamethrower towers. And as in the previous games – it’s definitely worth investing in upgrading them, since at maximum level they gain some extremely powerful upgrades. One issue that did standout was the poor balance of some of the new arrivals, particularly the anti-air missile and the flamethrower towers. I found them all but useless, even at maximum upgrade. The orbital weapons also offer a nice choice of ways to eliminate the enemy – with both manually targetable and auto-aim weaponry to wreak mayhem on the aliens.

Another thing you’ll earn for the successful completion of campaign missions is experience, which will go towards leveling up your commander. Now we have a unique supporting unit to help us fight against the hordes of enemies. This robotic unit will defend a barrier either by using ranged guns or melee attacks, as well as boosting the power of towers within its reach. As you upgrade your commander you can also give him some special abilities, most notably one to allow him to move from barrier to barrier. And if he dies – don’t worry – after a short while he will be resurrected at the mothership and will beam down to help you out again.

Technically Sentinel 3 upholds the series’ standard as one of the most polished Tower Defence games ever. The graphics are detailed and of superb quality and the visual effects, including the multi-coloured fog are simply amazing. And full Retina-support! The interface is very intuitive and hasn’t changed much from the previous Mars and Earth Defense games. One thing that was a bit frustrating was that I always wanted to tap the commander to see his morale boost range, but instead it only displayed when you try to place a tower.

Sentinel 3: Homeworld is a logical continuation of the highly successful TD series. It doesn’t revolutionize the genre but builds on the success of its predecessors by adding more carefully chosen and polished features to an already perfect gameplay design. Superb graphics, several modes of gameplay, customizable weapons loadout, levelable commander – this is one sweet package! Homeworld is certainly one of the most addictive Tower Defense games I’ve ever played and it’s a definite recommendation from me to both die-hard fans and newcomers to the genre.

With this I declare Sentinel 3: Homeworld officially touched!

App Summary
Title: Sentinel 3: Homeworld Developer: Origin8
Reviewed Ver: 1.0.0 Min OS Req: 3.0
Price: $2.99 App Size: 92.91MB
  • Many towers and orbital weapons with customizable loadout
  • Upgradable commander
  • Polished and addictive gameplay
  • Many gaming modes
  • Beautiful detailed graphics
  • Some balancing issues on lower-end towers


Take a look at a few more Tower Defense reviews on the iDevice:

A project manager in a major telecommunications supplier, an iPhone junkie and lately - a TMA editor. Love long walks on the beach and my wife, who is the most beautiful girl on the face of this planet. You can also follow me on twitter for all things iPhone and project management (and some personal stuff as well):

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