Enter the first level of the game
Shoot your first enemy
Shoot an enemy while he is reloading
Make two enemies shoot each other
Smash an enemy with a box
Blow up an enemy
Make an enemy shoot a barrel of TNT
Blow up several barrels of TNT in a row
Collect 3 bullets in the same stage
Blow up more than one enemy with just one dynamite
Shoot down the shotgun enemy
Defeat the boss
Complete all stages