Score 250,000 points or more in one game at standard difficulty level or lower
Finish wave 20 without touching a mine or other obstacle at standard difficulty level or higher
Collect 30 or more bonus crystals in a single game
Complete the first wave in 5 seconds
Score 25,000,000 points or more in one game
Score 250,000,000 points or more in one game
Have 30 lives in hand at standard difficulty level or higher
Have 30 smarts in hand at standard difficulty level or higher
Reach 3,000,000 points without losing a life at standard difficulty level or higher
Reach 5,000,000 without using a single smart bomb
Stay alive long enough for the screen to accumulate 20 baddies - then zap 'em!
Complete the first 60 waves in a single game
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