The Crimson Squadron
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Fast-Paced Kill-or-be-Killed Action though Swipes of Your Finger.
The new type of game-play offers Puzzle/Strategy/RPG elements and allows you to upgrade, unlock special skills and purchase new ships without complected game-play, which allows you to focus on only battle itself.
In order to succeed you must both defend well and destroy enemies as fast as you can though the 48 challenging levels.
The game-play is easy to pick up but becomes mind-numbingly challenging as you progress.