由获奖众多的知名守塔游戏作者Sentinel所推出的新作，这次的场景发生在外太空，并有较一般塔防游戏稍为创新的玩法，玩家需在陨石上采矿，以建造武器并抵御敌人来犯，此外整体游戏画面看上去颇为精美。

FEATURES

• Construct weaponry and mining tools using an intuitive tower defense style interface.
• Design and power vast networks of structures, then defend them against alien incursion!
• Earn upgrades and unlocks for your space station to increase its power and abilities!
• Story-based campaign mode where you are humanity's last chance for survival.
• Play one of three freeform, endless modes and compete with other players worldwide using the online leaderboards.
• Mission mode provides quick tactical challenges. Beat a scenario to earn achievements!
• Multiplayer head-to-head! Play against another player on iPhone, iPod Touch or iPad! Needs LAN WiFi or Bluetooth.
• Full OpenFeint integration provides multiple user profiles, complete offline support, online scores and lots of achievements to earn.
• Awesome music & sound effects by Earcom.