Trophies - Successfully complete one of the following tasks to get a trophy:

You Tag 'em - I Bag 'em (Bronze): Eliminate 10 enemies that your partner has knocked down or thrown in your direction.
Focus Fire (Bronze): Take down 10 enemies in a row finishing off each of them before doing damage to anybody else.
Unending Combo (Bronze): String a single uninterrupted combo that's at least 10 hits long.
Gentleman (Bronze): Complete Chapter III without hitting the ladies before they hit you.
Ping Pong (Bronze): Hit at least 4 different enemies while building up a combo.
Primal Scream (Bronze): Sustain a single rage mode for 60 seconds.
Electric Explosion (Bronze): Hit 14 enemies with a single electrify armor blast.
Street Justice (Silver): Complete the game in Rorschach mode.
Morally Superior (Silver): Complete the game in Nite Owl mode.
Martial Artist (Silver): Perform all 8 Nite Owl combos within 60 seconds.
Feral Fighter (Silver): Perform all 8 Rorschach combos within 60 seconds.
Friends Forever? (Gold): Complete the game in Co-op mode.