Full list of all 50 Holy Potatoes! A Weapon Shop?! achievements. It takes around 20-25 hours to unlock all of the achievements in the base game on Windows.
The base game contains 45 achievements, and there is 1 DLC pack containing 5 achievements.
Complete Poseidadoes's Request
Complete Julios's Request
Complete Herclueless's Request
Collect 5 Molted Plumes for Athena
Meet Hermes