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.
Kill 50 Hostages
Unlock Chapter 3
Successfully complete all missions in Chapter 2
3-Star all missions in Chapter 2
Complete a level without taking any damage whatsoever
Get 100 kills as Recon
Rescue 1000 hostages
Get 100 kills as Agent Fergie
Stun 500 enemies
Get 100 kills as Assaulter
Set 20 enemies on fire
Unlock Chapter 2
Successfully complete all missions in Chapter 1
3-Star all missions in Chapter 1
Kill 1000 bad guys
Kick Open 100 Doors
Get 100 kills as Shield
Rescue 50 hostages
Get 3 stars in a mission
Get 100 kills as Breacher
Collect your first secret item
Kill 50 bad guys
Kill 3 enemies by blowing up one barrel
Win one mission in Coop
Kill an enemy with an elevator
Rescue 50 Wounded Policemen
Disarm 30 bombs
Kick Open 1000 Doors
Blow Open 100 Doors
Kill 3 enemies with one breaching charge
Use sniper support to kill 100 enemies
3-Star all missions in Chapter 3
Use sniper support to kill 1000 enemies
Successfully complete all missions in Chapter 3
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
Unlock Chapter 4
Make 5 VIP Arrests
Successfully complete all missions in Chapter 5
3-Star all missions in Chapter 5
Unlock Chapter 5