Begin the game
Kill a male zombie
Kill a female zombie
Kill ten zombies without missing
Kill six zombies in six seconds
Complete the first level
Complete the second level
Defeat a boss zombie
Complete the third level
Miss six times in a row
Miss twelve times in a row
Shoot 50 times
Shoot 100 times
Shoot 150 times
Shoot 200 times
Shoot 250 times
Shoot 300 times
Shoot 350 times
Shoot 400 times
Shoot 450 times
Shoot 500 times
Shoot 550 times
Shoot 600 times
Shoot 700 times
Shoot 800 times
Shoot 900 times
Shoot 1000 times
Shoot 1100 times
Shoot 1200 times
Shoot 1300 times
Shoot 1400 times
Shoot 1500 times
Shoot 2000 times
Shoot 2500 times
Shoot 3000 times
Shoot 3500 times
Shoot 4000 times
Shoot 4500 times
Shoot 5000 times
Shoot 7500 times
Shoot 10000 times
Shoot 12500 times
Shoot 15000 times
Shoot 17500 times
Shoot 20000 times
Shoot 22500 times
Shoot 25000 times
Shoot 27500 times
Shoot 30000 times
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Shoot 35000 times
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Shoot 40000 times
Shoot 41250 times
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Shoot 53950 times
Shoot 55000 times
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Shoot 60000 times
Shoot 61000 times
Shoot 62000 times
Shoot 63000 times
Shoot 64000 times
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Shoot 71000 times
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Shoot 79000 times