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.
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.