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Theta and Paralldox on Worldlines
A lovely logical puzzle game about the many-worlds interpretation and quantum mechanics.
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Release Date:
2025
Developer:
Publisher:
XXela, Delta Theta

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Features
Single-player
Steam Achievements
Family Sharing
Steam is learning about this game 
Languages:
Interface Full Audio Subtitles
English ✔
Simplified Chinese ✔

Download 茜塔和世界线悖论 Demo

This game is not yet available on Steam

Planned Release Date: 2025

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About This Game

  • Theta is a little girl who turns left every time she hits a wall. She is curious about the 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 and explore the truth of a world under the observation of "God"

  • The game is expected to feature 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.

  • About 200 handcrafted puzzles, along with meta puzzles 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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System Requirements

    Minimum:
    • Requires a 64-bit processor and operating system
    • OS: Windows 10/11
    • Memory: 4 GB RAM
    • Storage: 200 MB available space
    Recommended:
    • Requires a 64-bit processor and operating system
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