Bronze

BZB: In Space – No Time To Bleed
Get 100 Gatling Gun combos on the Engine Room.

BZB: In Space – Transporter Accident
Transport 1000 Zombies off the Mothership Bridge.

BZB: Zombie Sushi – This Is My Boomstick
100 Shotgun combos on either the Shrine or Castle.

BZB: Zombie Sushi – 1.21 Jigawatts
Electrify 1000 Zombies on the Shrine.

Silver

BZB: In Space – Top Ten
Beat ten of your friends in any leaderboard on either the Engine Room or Mothership Bridge.

BZB: In Space – Extreme Survivor
Survive 5 minutes with one life in Survival mode on Extreme difficulty on either Engine Room or Mothership Bridge.

BZB: Zombie Sushi – Top Ten
Beat ten of your friends in any leaderboard on either the Shrine or Castle.

BZB: Zombie Sushi – Extreme Survivor
Survive for 5 minutes with one life in Survival mode on Extreme difficulty on either the Shrine or Castle.

Source: http://www.ps3trophies.org/new…..Burn-.html