Bronze:

Stalker
Objective: Complete the stealth tutorial.

Burglar
Objective: Complete the lock picking tutorial.

Monkey
Objective: First time climbing completed!

Fighter
Objective: Complete the fighting tutorial.

Ninja
Objective: Complete chapter one without getting spotted.

Locksmith
Objective: Successfully lock pick or unscrew five doors or grates without being spotted.

Pugilist
Objective: Don't get knocked out in five consecutive fights.

First Blood
Objective: Beat your first opponent in underground fights.

Unbruised
Objective: Win a match flawlessly in underground fights.

Ringer
Objective: Defeat 50 enemies in underground fights.

All Inked Up
Objective: Get tattoos for all six locations on your body.

Swole
Objective: Lift the weights for at least 10 minutes (accumulated).

Bloody Knuckles
Objective: Punch the heavy bag for at least 10 minutes (accumulated).

Silver:

Untouchable
Objective: Win a match flawlessly in underground fights on Shark.

Mogul
Objective: Earn $5000.

Indefinite Furlough
Objective: Finish the game at any difficulty.

Lightning Reflexes
Objective: Successfully perform 50 reversal moves in fights.

The Best Defense...
Objective: Win a fight without blocking.

Insult to Injury
Objective: Win a fight using only reveral moves and finishing moves.

Gold:

Doesn't Play Well with Others
Objective: Beat up more than 100 people on Shark.

The Great White
Objective: Finish the game on Shark.

Invisible
Objective: Complete every chapter without being seen.

Platinum:

Platinum
Objective: Unlock all trophies.

Secret Trophies:

Secret Trophy
Objective: Continue to play to unlock this secret trophy.

Secret Trophy
Objective: Continue to play to unlock this secret trophy.

Secret Trophy
Objective: Continue to play to unlock this secret trophy.

Secret Trophy
Objective: Continue to play to unlock this secret trophy.

Secret Trophy
Objective: Continue to play to unlock this secret trophy.

Secret Trophy
Objective: Continue to play to unlock this secret trophy.

Secret Trophy
Objective: Continue to play to unlock this secret trophy.

Secret Trophy
Objective: Continue to play to unlock this secret trophy.

Secret Trophy
Objective: Continue to play to unlock this secret trophy.

Secret Trophy
Objective: Continue to play to unlock this secret trophy.

Secret Trophy
Objective: Continue to play to unlock this secret...