The world of Scribblenauts Unlimited is full of wonder and magic. Maxwell's quest begins when he pranks an old wizard, leading to a chain of events that forces him to rescue his sister from a powerful spell. To do so, he must travel far and wide, helping those in need to gather the necessary Starites and pieces.
Unlike its predecessors, Scribblenauts Unlimited takes a different approach with its level-based structure. Players encounter multiple people with quests in the same zone, each with their own puzzle to solve. The notebook plays a key role once again, summoning items or characters that the player has written into it. This feature remains unchanged from previous games. A new twist is added with riddles found in the menu, categorized by subject, requiring players to make educated guesses about the item being referred to.
The game also introduces an innovative object editor, allowing players to create and share their own items within the game.