Here is the full list of all 51 Door Kickers: Action Squad achievements. It takes around 15-20 hours to unlock all of the achievements on Windows.
Disarm 30 bombs
Rescue 1000 hostages
Successfully complete all missions in Chapter 3
Get 100 kills as Shield
Rescue 50 Wounded Policemen
Kill 50 Hostages
3-Star all missions in Chapter 2
Kill an enemy with an elevator
Get 100 kills as Recon
Kick Open 1000 Doors
Complete a level without taking any damage whatsoever
Successfully complete all missions in Chapter 2
Unlock Chapter 5
Stun 500 enemies
Unlock Chapter 4
Get 100 kills as Agent Fergie
Unlock Chapter 3
Use sniper support to kill 100 enemies
Set 20 enemies on fire
Kill 1000 bad guys
Unlock Chapter 2
Get 100 kills as Breacher
Kick Open 100 Doors
Rescue 50 hostages
Get 100 kills as Assaulter
Collect your first secret item
Kill 3 enemies with one breaching charge
Kill 50 bad guys
Get 3 stars in a mission
Successfully complete all missions in Chapter 1
3-Star all missions in Chapter 1
Kill 3 enemies by blowing up one barrel
Win one mission in Coop
Blow Open 100 Doors
3-Star all missions in Chapter 3
Use sniper support to kill 1000 enemies
Kill yourself with your own explosives
Use 5 extra lives in the same mission
Resurrect another player 5 times in the same mission
Collect all 20 secret items
Successfully complete all missions in Chapter 4
3-Star all missions in Chapter 4
Make 5 VIP Arrests
Successfully complete all missions in Chapter 5
3-Star all missions in Chapter 5