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