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.
Defuse a bomb with less then 1 second left.
Defuse 100 bombs.
Fully complete campaign "A Hard Day's Work"
Win a campaign in Iron Man Mode.
Level-up your squad to maximum level.
Have a squad of fully leveled up troopers.
Unlock all equipment / weapons.
Unlock all playable classes
Level-up a trooper to maximum level.
Complete 150 missions.
Breach 400 doors.
Walk total 10000 meters.
Arrest 100 enemies.
Kill 1000 enemies.
Fire a total of 10000 rounds.
Have a shield unit kill three enemies without moving.
Unlock the Breacher class
Get 50 stars
Hit 5 enemies with the same Flashbang.
Unlock the Shield Class
Handcuff your first bad guy
Defuse your first bomb
Save your first hostage
Unlock the Assaulter class
Get your first One Man Army Medal
Get 13 stars
Complete 10 missions
Get your first Perfect Plan Medal
Get your first No Pause Medal
Get a 3 star result as an "improved result" on a mission
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.
Fully complete campaign "Drug Bust"
Fully complete campaign "The Cell"
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.
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"