Apps in this category may contain mild or occasional cartoon, fantasy or real-life violence, as well as occasional or mild adult, sexually suggestive or horrifying content and may not be suitable for children under 9 years of age.

12+

Apps in this category may contain occasional mild indecent language, frequent or intense cartoon or real-life violence, minor or occasional adult or sexually suggestive material, and simulated gambling, and may be for children under 12 years of age.

17+

You must be at least 17 years old to access this App.

Apps in this category may contain frequent and intense offensive language; Frequent and intense cartoon, fantasy or realistic violence: frequent and intense adult, scary and sexually suggestive subjects: as well as sexual content, nudity, tobacco, alcohol and drugs, may not be suitable for children under 17 years of age.

環形防禦螢幕截圖

iPad

iPhone

About 環形防禦

環形防禦是一款獨特又具有快速感的街機射擊遊戲。玩家將會操控飛船來抵禦外來的隕石，確保它們不會擊破最後的防線。

環形防禦採用了簡易的觸控拖曳來操控飛船。此操控能確保玩家可以很精準又快速的移動飛船來瞄準射擊目標。

遊戲裡具有超過十種獨特的能量加強技可被解鎖。每一個能量加強技都會給玩家帶來全新的遊戲體驗與樂趣。

遊戲特點：
- 考驗節奏與反應，極具挑戰性的遊戲
- 簡易操控
- 無限的挑戰
- 獨特的能量加強技術
- 贏取晉升徽章
- 生動的視覺效果
- 具有刺激感的音樂效果
- Game Center 成就系統