XtremeRex

Axed

Kill 50 Chimera with Riley's axe in the Single Player Campaign

Protection Camp

Successfully complete level 5

Lethal

Kill 1000 Chimera in the Single Player Campaign

Ellis Island

Successfully complete level 4

Variety

Use the secondary fire of each weapon in the Single Player Campaign

Boom

Kill 100 Chimera with headshots in the Single Player Campaign

Indiscriminate

Kill an enemy with every weapon in the Single Player Campaign

George Washington Bridge

Successfully complete level 3

Impaled

Kill an Impaler

Deadly

Kill 500 Chimera in the Single Player Campaign

Military Ocean Terminal

Successfully complete level 2

Secret Achievement

Dangerous

Kill 250 Chimera in the Single Player Campaign

Staten Island

Successfully complete level 1

Executed

Kill an Executioner

Upgrade

Upgrade a weapon in the Single Player Campaign

Platinum

Earn all trophies

Customise

Upgrade all weapons in the Single Player Campaign

Overheat

Kill 50 Chimera by detonating their heatstacks in the Single Player Campaign

Giant

Kill any combination of 18 Impalers or Executioners

Secret Achievement

Incite

Complete one round of multiplayer

Conversion Tower

Successfully complete level 6

Secret Achievement

Combine

Upgrade both slots of a weapon in the Single Player Campaign