Here is the full list of all 34 Police Shootout achievements.
Finish mission Screaming at the warehouse
Finish mission Brawl at the garage
Arrest the workshop owner
Use fazer
Finish mission Fight at the bar
Collect drugs at the motel
Pay Lola for the information
Finish mission Stealing fuel
Arrest the tank cleaning center manager
Finish mission Stealing merchandise
Make noise in the warehouse
Arrest the informant in the warehouse
Finish mission No contact with security
Arrest the informant in the supermarket
Finish mission Stalker at the motel
Finish mission Gas station hostage
Enter the gas station through the window
Use the car alarm at the gas station
Finish mission Parking lot brawl
Collect drugs at the supermarket
Save a child in the supermarket
Take the civilians out of the supermarket
Finish second tutorial
Finish first tutorial
Finish mission Suspicious transport
Finish mission Abandoned car
Call for backup in an abandoned factory
Enter the workshop owner office through the window
Enter the warehouse through the window
Complete all missions
Get the max Stealth skill level
Get the max Combat skill level
Get the max Negotiations skill level
Use shotgun in a gunfight