Other shapes to appear are the long and high jumping John, the large cube Claire who feels like a superhero because she can float on water while other shapes drown when they come in contact with it, and Laura who can be used to bounce as a trampoline. He cannot jump as high and they often need to act as stepping stones for each other. The first to appear next is Christopher, an orange cube who takes an immediate dislike to Thomas. Soon after, other shapes appear and while they provide a method for more complex puzzles by working together, the story's focus is on the interaction between the shapes, building their personality through their cooperation and abilities.

He has no idea where he is and does not know his purpose, but he quite enjoys moving around and jumping. The red shape is called Thomas and he feels alone. While the environment is a plain collection of shapes and the puzzle platforming is straightforward, the game is brought to life through the narration, explaining the thoughts and the emotions of the shape.

A level is completed when the shape is moved to a white outline of its form. The goal is to move through an abstract environment to complete 100 levels by moving and jumping. The player takes control of a red shape that represents a string in a programming environment. Thomas Was Alone is a puzzle platformer about friendship and a remake of the Flash game with the same name.

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