Here is the full list of all 23 Pest'Off achievements.
The base game contains 0 achievements, and there is 1 DLC pack containing 23 achievements.
Kill a total of 100 Mutants.
Kill a total of 500 Mutants.
Kill a total of 1000 Mutant
You understood the pattern.
You found the dog.. but at what cost ?
You found Ralph's lost ID !
Complete the ''Home Sweet Home'' mission.
Complete the ''Give it a rest'' mission.
Complete the ''Milk Run'' mission.
Clear 15 rounds in "The Pit" arena
Complete ''The Slammer'' mission.
Complete the ''CIty Pulse'' mission.
Clear 20 rounds in the "Concrete Valley" arena
Complete the Training Ground.
Gamble a total of 20 times.
Own every available weapons.
Finish a mission without taking any damage.
Play some guitar.
Make 10 Mutant dance in a single use of the Wiggler Bomb.
Kill an Armored Mutant by exploding the propane tank on it's back.
Use a Beer and a Cigarette within 10 seconds of each other.
Make the Gas Station explode by smoking near the pumps.
Kill a total of 5000 Mutants.