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

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

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

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

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

Have 30 lives in hand at standard difficulty level or higher

Complete the first 60 waves in a single game

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

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

Have 30 smarts in hand at standard difficulty level or higher

Complete the first wave in 5 seconds

Collect 30 or more bonus crystals in a single game