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.
Fire a total of 10000 rounds.
Level-up your squad to maximum level.
Walk total 10000 meters.
Unlock all playable classes
Kill 1000 enemies.
Get 50 stars
Fully complete campaign "A Hard Day's Work"
Unlock the Breacher class
Handcuff your first bad guy
Save your first hostage
Get your first Perfect Plan Medal
Unlock the Shield Class
Complete 10 missions
Get a 3 star result as an "improved result" on a mission
Hit 5 enemies with the same Flashbang.
Get 13 stars
Unlock the Assaulter class
Get your first No Pause Medal
Complete 150 missions.
Arrest 100 enemies.
Breach 400 doors.
Get one star in every Single Mission.
Get two stars in every Single Mission.
Get three stars in all Single Missions.
Get 30 Perfect Plan Medals.
Get 30 One Man Army Medals.
Get 30 No Pause Medals.
Defuse a bomb with less then 1 second left.
Fully complete campaign "Drug Bust"
Fully complete campaign "The Cell"
Win a campaign in Iron Man Mode.
Level-up a trooper to maximum level.
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.
Have a shield unit kill three enemies without moving.
Kill 10 bad guys within 5 seconds, without letting them fire a shot.
Fully complete campaign "Terror at Sea"
Fully complete campaign "Suits and Ski-Masks"
Defuse your first bomb
Get your first One Man Army Medal