Bronze:

Just like Dad would have done
Objective: Complete the game on any difficulty level

Shad-owned
Objective: Perform a silent kill with Shadow

That's what you gets!
Objective: Kill an enemy by knocking or throwing him off a ledge

Got your GAC
Objective: Take a GAC hostage

Get ready for a surprise!
Objective: Leap over and kick an enemy from cover

Dog tag
Objective: Perform a tag team kill with Shadow

Head Banger
Objective: Open 10 doors with a hostage head

Scrotality
Objective: Perform a Shadow groin takedown

Crime and punishment
Objective: Perform 50 takedowns

Dog's dinner
Objective: Perform 50 Shadow kills

Bring a gun to a fist fight
Objective: Perform 50 disarms

It's all in the timing
Objective: Perform 50 counters

Featherweight
Objective: Perform 200 3-hit combos

Shadowboxing
Objective: Dash evade 50 strikes

The price of justice
Objective: Collect 25 cop badges

Medal of merit
Objective: Bronze rating on every level

Boom!
Objective: Get 30 headshots in any level, on OFFICER or greater difficulty.

Silver:

Best cop this city's ever had
Objective: Complete the game on OFFICER difficulty

Brawler
Objective: Complete any level (excluding the Prologue) without firing a shot

Heavyweight
Objective: Perform 100 5-hit combos

Honor the dead
Objective: Collect 50 cop badges

Medal of bravery
Objective: Silver rating on every level

Shhhhh
Objective: Complete any level with 10 silent kills, on OFFICER or greater difficulty.

Perfect balance
Objective: Achieve maximum VARIATION BONUS on any level (excluding the Prologue)

Got your back
Objective: Complete a level without Jack or Shadow dying (levels 3-10)

First at the scene
Objective: Achieve maximum CLEAR TIME BONUS on any level (excluding the Prologue)

Finish him Shadow!
Objective: Combine Jack and Shadow to kill 20 enemies in any level, on OFFICER or greater difficulty.

Gold:

Retribution
Objective: Complete the game on DETECTIVE difficulty

Medal of valor
Objective: Gold rating on every level

Platinum:


Objective: Collect all the game's 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