Here is the full list of all 43 Door Kickers achievements. It takes around 25-30 hours to unlock all of the achievements on Windows.
Win a campaign in Iron Man Mode.
Arrest 100 enemies.
Have a shield unit kill three enemies without moving.
Unlock the Assaulter class
Unlock the Breacher class
Unlock the Shield Class
Breach 400 doors.
Level-up a trooper to maximum level.
Complete 150 missions.
Fully complete campaign "Suits and Ski-Masks"
Get 13 stars
Get 50 stars
Complete 10 missions
Save your first hostage
Defuse your first bomb
Handcuff your first bad guy
Get your first Perfect Plan Medal
Get your first One Man Army Medal
Get your first No Pause Medal
Unlock all playable classes
Get a 3 star result as an "improved result" on a mission
Get 30 Perfect Plan Medals.
Get 30 No Pause Medals.
Fully complete campaign "The Cell"
Hit 5 enemies with the same Flashbang.
Fire a total of 10000 rounds.
Fully complete campaign "Drug Bust"
Level-up your squad to maximum level.
Walk total 10000 meters.
Kill 1000 enemies.
Fully complete campaign "A Hard Day's Work"
Kill 10 bad guys within 5 seconds, without letting them fire a shot.
Get one star in every Single Mission.
Get two stars in every Single Mission.
Get three stars in all Single Missions.
Get 30 One Man Army Medals.
Defuse a bomb with less then 1 second left.
Have a squad of fully leveled up troopers.
Unlock all equipment / weapons.
Complete a mission arresting 6 or more bad guys and without killing any.
Have your entire team killed at roughly the same time after unpausing the game, within seconds of mission start.
Defuse 100 bombs.
Fully complete campaign "Terror at Sea"