Here is the full list of all 32 Police Tactics: Imperio achievements.
Remove 3 Crime Rings.
Employ four officers simultaneously.
Raise the average safety of your unlocked districts above 99%.
Remove 5 speeding areas.
Own 3 helicopters simultaneously.
Fill all bonus slots.
End a car chase under 20 seconds.
Remove a Crime Ring by arresting its leaders.
Remove crime ring under 180 seconds.
Own 12 police cars simultaneously.
Solve a case after your Investigators failed to gather evidence.
Fail a story mission
Arrest a group of criminals while they are on the way to commit a crime.
Purchase a bonus room.
Upgrade a room to maximum level.
Obtain a Speeding Camera Van.
Catch a speeding vehicle with a camera van.
Solve 25 cases (including story missions).
Respond to a crime in under 15 seconds.
Finish a Story mission.
Purchase a vehicle.
Promote a rookie to an Officer.
Have 12 employees in your HQ.
Fail to solve 10 cases.
Unlock the second district.
Unlock all districts in the city.
Upgrade all rooms to maximum level and fill all bonus slots.
Stop an escaping car with a roadblock.
Finish the Story.
Solve 100 cases (including story missions).
Solve 250 cases (including story missions).
Lower the average safety of your unlocked districts below 10%.