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• Unlock Apocalypse

Stay alive long enough for the screen to accumulate 20 baddies - then zap 'em.

• Unlock Crystal Master

Score 1,000,000 or more points in one game.

• Unlock Crystal Ninja

Score 10,000,000 points or more in one game at standard difficulty level or lower.

• Unlock Crystal Rookie

Score 10,000 points or more in one game at standard difficulty level or lower.

• Unlock Immortal

Reach 1,000,000 points without losing a life at standard difficulty level or higher.

• Unlock Life-saver

Have 30 lives in hand at standard difficulty level or higher.

• Unlock Marathon Man

Complete the first 60 waves in a single game.

• Unlock Navigator

Finish wave 20 without touching a mine or other obstacle at standard difficulty level or higher.

• Unlock Nerves Of Steel

Reach 1,000,000 without using a single smart bomb.

• Unlock Smart-ass

Have 30 smarts in hand at standard difficulty level or higher.

• Unlock Speek Freak

Complete the first wave in 5 seconds.

• Unlock Treasure Hunt

Collect 30 or more bonus crystals in a single game.

• Bookmark or Share Crystal Quest

Bookmark or Share Crystal Quest on Xbox 360