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