Berserker
Destroy 20 enemies in less than 1 second
Bronze
Bomber
Destroy 1000 enemies with the bomb launcher weapon
Silver
Bullet Time
Destroy 10 enemies with the time stopped or slowed down in one go
Bronze
Bullfighter
Destroy 100 Bull enemies
Bronze
Butcher
Destroy 500 enemies
Bronze
By a Hair's Breadth
Finish a wave with 1 or less seconds left
Bronze
Chain Reaction
Drop a Decoy and a Turret in less than 1 second
Bronze
Live in the Shadows
Stay hidden for a total of 10 minutes
Bronze
Mass Murderer
Destroy 10000 enemies
Silver
Shield Breaker
Destroy 100 Shield bearer enemies
Bronze
Slayer
Destroy 2500 enemies
Bronze
Slippery
Stay hidden for more than 15 seconds in a single level
Bronze
Sniper
Destroy 1000 enemies using the laser weapon
Silver
Story Mode Completed
Finish Level 10 Successfully
Silver
Two Birds One Stone
Destroy 15 or more enemies with a single explosion
Bronze