You've walked the walk and came out on top.

Kill 3 enemies by blowing up one barrel

Successfully complete all missions in Chapter 1

Successfully complete all missions in Chapter 2

Kill an enemy with an elevator

3-Star all missions in Chapter 1

3-Star all missions in Chapter 2

Kill 1000 bad guys

Rescue 50 Wounded Policemen

Disarm 30 bombs

Kick Open 100 Doors

Kick Open 1000 Doors

Blow Open 100 Doors

Stun 500 enemies

Kill 3 enemies with one breaching charge

Complete a level without taking any damage whatsoever

Use sniper support to kill 100 enemies

Set 20 enemies on fire

Unlock Chapter 2

Unlock Chapter 3

3-Star all missions in Chapter 3

Rescue 50 hostages

Rescue 1000 hostages

Use sniper support to kill 1000 enemies

Successfully complete all missions in Chapter 3

Kill yourself with your own explosives

Kill 50 Hostages

Use 5 extra lives in the same mission

Resurrect another player 5 times in the same mission

Collect all 20 secret items

Collect your first secret item

Kill 50 rats

Defuse a bomb in the last 3 seconds

Successfully complete all missions in Chapter 4

3-Star all missions in Chapter 4

Unlock Chapter 4

Make 5 VIP Arrests

Successfully complete all missions in Chapter 5

3-Star all missions in Chapter 5

Unlock Chapter 5

Get 100 kills as Assaulter

Get 100 kills as Breacher

Get 100 kills as Shield

Get 100 kills as Recon

Get 100 kills as Agent Fergie

Get 100 kills as Off-duty Guy

Unlock Chapter 6

Complete all missions in chapter 6

3-Star all missions in Chapter 7