Watterson Express is an official game based on The Amazing World of Gumball.
The Wattersons (excluding Anais) are coming out of their house with items they have to deliver to Tobias, Anais, Penny and Granny Jojo. The player guides the Wattersons by clicking the arrows which causes them to change direction. When a character steps on an arrow, they will go up/down/left/right depending on where the arrow is pointing. After completing a set number of deliveries the player moves to the next level. If the player delivers an item to the wrong person, the life bar will drop. The game is over when the life bar drops to zero.
- Darwin, Nicole and Richard have their season 3 designs in the game's intro, but have their season 2 designs in the game. Gumball, however, has his season 3 design in the icon, title screen and the game's intro, but has his season 2 design in the game.