Complete the indicated task to unlock the achievement.

Achievement	How to unlock
Aliens go home!	Shoot down Ufoboss' spaceship.
Bullet time	Shoot 50 enemies.
Call me Tesla	Electrify 100 enemies.
Call me the emperor	Electrify 500 enemies.
Can't stop!	Collect 300 items.
Collector	Collect 50 items.
Damsel in distress	Complete the game.
Dodge this!	Shoot 250 enemies.
Dynamite man	Explode 50 enemies.
Fall of Bearboss	Kill Bearboss and gain 3 medals.
Final countdown	Launch 25 rockets.
Follow the trend	Kill Zomboss for good.
Forest roar	Kill Bearboss.
I killed hundreds of them!	Kill 1000 enemies.
I'm perfect, baby!	Collect all the normal mode medals.
I'm ready	Complete all the tutorial stuff.
Look, I'm dying!	Kick the bucket 10 times.
Mister in distress	Complete the game at hard mode.
Power of powder	Blast 250 enemies.
Rocket launcher	Launch 5 rockets.
Rookie	Complete the first stage.
Skeleboss mortification	Kill Skeleboss and gain 3 medals.
Still dying	Kiss the dust 100 times.
There can be only one	Kill Skeleboss.
Ufoboss humiliation	Destroy Ufoboss and gain 3 medals.
Why, I'm crazy!	Collect all the hard mode medals.
Your first hundred	Kill 100 enemies.
Zomboss take-down	Kill Zomboss and gain 3 medals.