'Fill the Fridge' features three game modes built around the theme of the "fridge": Glutton Mode, Chef Mode, and Puzzle Mode. Although each mode has different rules, all of them involve the act of "putting food into the fridge."

Glutton Mode

The goal is to survive for as long as possible by filling the fridge with food. Each food item has a Satiety Value, and larger foods have a higher Satiety Value. At the end of every round, the Glutton eats all the food inside the fridge!

The total required Satiety Value that must be filled in the fridge increases with each round. If the required Satiety Value is not met, the player's health decreases by one, and the game ends when health reaches zero.

Chef Mode

The Chef periodically throws random ingredients into the fridge. Players must rearrange the ingredients inside the fridge to collect food. When adjacent food items satisfy a recipe, they can be turned into a dish and served to the customers. If there is no more space in the fridge for the Chef to throw ingredients, the player loses!

Puzzle Mode

The objective is to clear the stage by completely filling the inside of the fridge using the given food items. This mode consists of multiple stages and can be enjoyed leisurely without a time limit.