$2.99: Sentinel

Price: $4.99 $2.99 until 04/05/2009 

A note from Origin8 Technologies, the maker of Sentinel: Not an April Fool’s! Origin8’s acclaimed sci-fi Tower Defense game is on sale for a limited period. The newly released version 1.2 improves performance and adds Facebook Connect for ease of bragging.

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.

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.

- Compete with players worldwide with the online high score system. View and compare scores seamlessly with the in-game score browser.

- 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.

- Facebook Connect feature so you can post scores to your newsfeed!