Ranked among the most popular(three) papa's games are:

Papa’s Pizzeria: The first Gameria game, where the player has to make pizzas for the customers. It was released in 2007 and is available on web browsers pc and iphone, android.
Papa’s Freezeria: The fourth Gameria game, where the player has to make frozen treats for the customers. It was released in 2011 and is available on web browsers(safari, edge, firefox) and mobile devices(Android, IOS).
Papa’s Scooperia: The fourteenth Gameria game, where the player has to make cookie sundaes and cakes for the customers. It was released in 2018 and also is available on web browsers, tablets and all modern mobile device.