Like defense games, but sick of "flicking" enemies around a screen with your finger?

If so, then you'll love Alien Outpost!

Alien Outpost is a fast paced defense game with awesome shooter gameplay mechanics! Defend your base against wave after wave of alien attackers, and manage your assets wisely as you upgrade your defenses. Alien Outpost will have you on the edge of your seat!


Features:

- Online Scoreboard with OpenFeint
- Multiple Difficulty Levels 
- Innovative "shooter" control scheme
- 7 creative and wacky alien enemies
- Upgradable weapons, bases, special weapons, and more
- Changing times of day
- Automatic save/load
- Local scoreboard

Potential future updates:

- Even more powerful and interactive special weapons
- Even more fun and challenging enemies
- Bosses

Source: App Store