在太空中的火星轨道站，有一天，前哨站被一些不知名的外星人进攻了。你的任务就是顺藤摸瓜，摧毁敌人的炮台，捣毁敌人的基地，消灭一切有生力量，有很多武器可供选择更换。

FEATURES:
- 460 rooms with 13 hardcore missions
- Stunning graphics optimized especially for iPhone
- Blazing fast gameplay
- Uber-responsive controls
- Awesome original soundtrack
- A smooth learning curve with increasingly challenging maps and smart enemy AI
- Inventory for customizing onboard weapons before each new battle; try different combos of arm and shoulder-mounted guns, shield boosters and emergency repair packs
- Detailed weapons stats & in-game weapons feedback for kickback, fire rates and damage estimates
- Experience points
- Character progression
- Hidden power-ups
- Weapons and gear drops
- Map-based exploration
- Checkpoints / teleportation nodes
- Cash and hidden loot to purchase upgrades in the virtual shop

版本 1.5.1 中的新功能

• Lots of bug fixes and stability improvements.