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When Papa Louie runs off on another adventure, Delivery Boy Roy is left in charge of Papa's Pizzeria. Unfortunately for Roy, the customers are used to Papa Louie's style of fully custom pizzas. Whether it is 8 slices of pepperoni everywhere and 2 olives on the lower half, or a 10 onion pizza cooked well done and cut in 4 slices, there is no telling what they will come up with. So, master the 4 stations and work up the ranks to be the best Pizza Chef around!
Introduction (Narrative Version)
One day in Tastyville, Roy finishes delivering pizzas and comes back to the restaurant. When he enters the Pizzeria and turns on the lights, he shouts for his uncle, Papa Louie, but there is no answer. Roy shouts again, but Louie is nowhere to be found. Roy spots a letter on the counter and reads it. In the letter, Papa Louie tells Roy to run the Pizzeria while he's gone. Terrified, Roy sees Kingsley at the door waving his hand.
Undefined (for the first day, after that it reverts back to "Better than Papa")
If a player makes his or her save slot name almostpapa, the player will go to Day 99, Rank 30. Every customer will be unlocked with a gold customer badge except Sarge Fan. Sarge Fan! is silver with 3 stars. Papa Louie is not unlocked until you get Sarge Fan! at gold, so Day 101 is the earliest day if you use almostpapa to unlock Papa Louie and if you make Sarge Fan happy.
Papa's Pizzeria is the only Gameria that has an animated intro instead of a slide show intro.
It's also the 2nd game in the entire Papa Louie franchise to have an animated intro, the first being Papa Louie: When Pizzas Attack!
This game has 7 order spaces, with one space indicating how many slices and length of cooking time.
As the oldest time-management game in the series, this game does not include:
A store to buy items to decorate the restaurant (introduced in Papa's Burgeria)
Your choice between a male and female worker. (Female workers were not available in this game, and were introduced in Papa's Burgeria. Custom workers were not available until Papa's Wingeria).
When Roy presents an order to a customer, he is shown giving the pizza to a customer. In the Burgeria and beyond, the customer is already either looking at the food or eating part of it.
This game has "New Menu Items" on Day 2, but there isn't a screen showing it. The pepperoni is already unlocked on the first day in the tutorial, and the rest of the toppings appear on Day 2.
This is the only Gameria in which ranks are not given by points but by tips.
This game and Papa's Burgeria are the only two games which do not feature a closer.
In the Customer Folder, when you click on an unlocked customer, the folder flips to that customer, but in between flips, you can see for a split second a customer that isn't in the game. His name is Johnny, and he makes his debut as a customer in Papa's Hot Doggeria going by the name of Pinch Hitwell.
On May 1, 2014, there was a post mortem posted on the Flipline Blog. 
Papa's Pizzeria makes a cameo in the Papa's Pancakeria intro, although it looks different from the beginning of the day slide.
Kingsley is the only new local that appears before all WPA! customers are unlocked.
Nobody orders a pizza cooked for longer than 45 minutes.
Olga is the only customer to have her pizza cooked for three-quarters of a meter, the longest time to cook the pizza in the game.
The last customer of the day will always order his or her pizza cooked for the shortest time (first mark on the dial), no matter if they order it this way or not. They will order for the shortest time the day after they came as the last customer on the previous day.