Here is the full list of all 13 Pickle Clicker achievements. It takes around 2-3 hours to unlock all of the achievements on Windows.
Kill and collect 250 Poglins
Reach pickle level 100
Achieve 250 upgrade pickles
Achieve 250 auto pickles
Reach pickle level 250
Kill and collect 50 Poglins
Max out pickle clicks
Kill and collect 100 Poglins
Reach pickle level 50
Achieve 100 upgrade pickles
Achieve 100 auto pickles
Achieve 50 upgrade pickles
Achieve 50 auto pickles