Sentinel: one more Tower Defense type game [AppStore, Games]

This is one more tower defence type game. 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.

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

Excellent graphics. Avaliable in AppStore for $4.99 (link).

Related games:

• TapDefense
• Besiegement
• Fieldrunners
• 7 Cities TD