Here is the full list of all 78 Holy Potatoes! What the Hell?! achievements.
Cook 100 Dishes in a single playthrough
Brew 13 Baaley's in a single playthrough
Brew 5 Baaley's in a single playthrough
Unlock 20 Recipes in a single playthrough
Advance to Circle of Gluttony!
Sort 300 Sinners in a single playthrough
Complete 50 Orders in a single playthrough
Cook 50 Dishes in a single playthrough
Unlock 15 Recipes in a single playthrough
Sort 100 Sinners in a single playthrough
Get Thanatos to visit your restaurant!
Advance to Circle of Lust!
Complete 13 Orders in a single playthrough
Cook 13 Dishes in a single playthrough
Sort 13 Sinners in a single playthrough
Get Loki to visit your restaurant!
Get to Limbo!
Sort 666 Sinners in a single playthrough
Sort 1000 Sinners in a single playthrough
Sort 2000 Sinners in a single playthrough
Sort 3000 Sinners in a single playthrough
Sort 5000 Sinners in a single playthrough
Complete 100 Orders in a single playthrough
Complete 300 Orders in a single playthrough
Complete 666 Orders in a single playthrough
Complete 1000 Orders in a single playthrough
Cook 300 Dishes in a single playthrough
Cook 666 Dishes in a single playthrough
Cook 1000 Dishes in a single playthrough
Send 5 sinners to heaven in a single playthrough
Send 13 sinners to heaven in a single playthrough
Send 50 sinners to heaven in a single playthrough
Send 100 sinners to heaven in a single playthrough
Send 300 sinners to heaven in a single playthrough
Send 666 sinners to heaven in a single playthrough
Brew 100 Baaley's in a single playthrough
Brew 300 Baaley's in a single playthrough
Brew 666 Baaley's in a single playthrough
Brew 1000 Baaley's in a single playthrough
Unlock 30 Recipes in a single playthrough
Unlock 40 Recipes in a single playthrough
Unlock 50 Recipes in a single playthrough
Spend 666 $tarch
Spend 1000 $tarch
Spend 2500 $tarch
Spend 5000 $tarch
Spend 10000 $tarch
Spend 20000 $tarch
Advance to Circle of Greed!
Advance to Circle of Anger!
Advance to Circle of Heresy!
Advance to Circle of Fraudery!
Advance to Circle of Violence!
Advance to Circle of Treachery!
Get Persephone to visit your restaurant!
Get Nyx to visit your restaurant!
Get Hades to visit your restaurant!
Get Kuk to visit your restaurant!
Get Anubis to visit your restaurant!
Get Nephthys to visit your restaurant!
Get Osiris to visit your restaurant!
Get Freya to visit your restaurant!
Get Hela to visit your restaurant!
Get Odin to visit your restaurant!
Get Izanami-no-Mikoto to visit your restaurant!
Get Oni to visit your restaurant!
Get Tengu to visit your restaurant!
Get Izanagi-no-Mikoto to visit your restaurant!
Beat Veggil in the Cook-off!
Beat Tarth Tater in the Cook-off!
Beat Hellatrix in the Cook-off!
Beat Dantee in the Cook-off!
Beat Mealeficent in the Cook-off!
Beat St. Reaper in the Cook-off!
Beat the "Ultimate Boss" in the Cook-off!
Obtain at least 25 score for Lunch Cook-off!
Obtain at least 25 score for Dinner Cook-off!
Obtain at least 50 total score for both Lunch and Dinner Cook-off!