Here is the full list of all 32 Police Tactics: Imperio achievements.
Finish a Story mission.
Purchase a vehicle.
Respond to a crime in under 15 seconds.
Employ four officers simultaneously.
Have 12 employees in your HQ.
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.
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
Promote a rookie to an Officer.
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%.