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Theta and Paralldox on Worldlines header art

Theta and Paralldox on Worldlines

A lovely logical puzzle game about the many-worlds interpretation and quantum mechanics.

Steam Page
Developer
XXela
Publisher
XXela, Delta Theta
Release
February 3, 2026
180 days ago
Steam Reviews
Very Positive261 reviews97.3%

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Updated: Jul 14, 2026Developer scaleThe operating scale of the game's developer.
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About the Game

  • Theta is a little girl who turns left every time she hits a wall. She is curious about the sinking world and discovers a mysterious place, where she picked up a fork that can split her into multiple copies of herself, and from that moment, the world changes forever.

  • Use the power of splitting to solve puzzles! Split yourself, the universe and something even vaster...

  • The game has 6 main chapters, each revealing at least one hidden truth that already hides within the core mechanics of the game from the beginning. Paralldoxs are under your nose!

  • By experiencing some abstract interpretations of modern physics, you will uncover the creation and operation of parallel worlds and other rules.

  • 240+ handcrafted puzzles, along with meta puzzles and hidden shiny collections that requires power of changing the world.

  • HInt system and Notebook : You can look up the knowledge you've learnt, or think about the essence of current level in Theta's dream.

  • Relaxing Graphics. Sit down and take a rest if you're tired. (Even in darkest places!)

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