Complete the indicated task to unlock the achievement.

Achievement	How to unlock
Arachnophobia (Bronze)	Kill 50 Spiders.
Arachnophobia (Gold)	Kill 200 Spiders.
Arachnophobia (Silver)	Kill 100 Spiders.
Black Metal (Gold)	Perform 30 Black Metal combos.
Black Metal (Silver)	Perform 10 Black Metal combos.
Blue Flavour	Complete the game with Crystal.
Collector	Unlock all of the Zombie Museum items.
Death Metal (Gold)	Perform 20 Death Metal combos.
Death Metal (Silver)	Perform 5 Death Metal combos.
Heavy Metal (Gold)	Perform 50 Heavy Metal combos.
Heavy Metal (Silver)	Perform 10 Heavy Metal combos.
Hot girl (Bronze)	Destroy 25 explosive items.
Hot girl (Gold)	Destroy 100 explosive items.
Hot girl (Silver)	Destroy 50 explosive items..
Love in trenches (Bronze)	Kill 25 Marines.
Love in trenches (Gold)	Kill 100 Marines.
Love in trenches (Silver)	Kill 50 Marines.
Master of Metal	Get the achievements 'Rock & Roll (Gold)', 'Heavy Metal (Gold)', Black Metal (Gold)' and 'Death Metal (Gold).
Miss universe	Unlock all achievements.
Purist	Complete the game on Hardcore difficulty without using any Continue.
Red Flavour	Complete the game with Zoe.
Rock and Roll (Gold)	Perform 50 Rock & Roll combos.
Rock and Roll (Silver)	Perform 10 Rock & Roll combos.
Yellow Flavour	Complete the game with Sasha.
Zombie killer (Bronze)	Kill 500 Zombies.
Zombie killer (Gold)	Kill 5000 Zombies.
Zombie killer (Silver)	Kill 2500 Zombies.