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