You are commander of the dropship Sentinel. You must defend a distant colony from the alien hordes in this stunning new evolution of tower defense.

Protect key structures which block the enemies' path as the aliens smash their way towards your stronghold. Utilize an array of advanced technology including upgradeable towers and droids which can repair buildings or harvest resources.

Update:

• 19/02/10 - Sentinel is one year old today! FREE from February 19th-22nd!

• 25/01/10 - v1.8 now live in the app store! OpenFeint 2.4 integrated!

Features:

• Tactical and unique gameplay which takes tower defense to the next level.

• Use the landscape and destroyable defenses to maximize the effectiveness of your weapons.

• Beautifully rendered environments, towers and enemies.

• Endurance mode to challenge the most hardened of players.

• Challenge your friends directly to beat your high score.

• Fast-forward toggle to speed up play for advanced players.

• Save your progress whenever you want. Automatically saves during a call.

• Full online high scores, achievements, friends and chat using OpenFeint.

Good luck, commander.

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