South Park: Snow Day! centers around the four main characters—Eric Cartman, Stan Marsh, Kyle Broflovski, and Kenny McCormick—participating in snow-based fights and activities, with players assuming the role of a player-created character named The New Kid (as with the previous games The Stick of Truth, Phone Destroyer, and The Fractured but Whole).[5][6]
After completing the tutorial, the player is placed in a small hub world, in which the population resides in Kupa Keep in Cartman's backyard. The player can interact with characters such as Cartman in which missions are selected, Mr. Hankey, who takes dark matter (actually feces) as currency to improve the player's perks through a skill tree, which can also be swapped to accommodate the player's preferences, Butters Stotch who keeps a record of cards found throughout the game, Tolkien Black who maintains the armory where the player can select weapons and abilities, and Tweek Tweak and Craig Tucker who maintain the Bazaar, where the player can purchase emotes or cosmetics with platinum points.