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Theta and Paralldox on Worldlines

Theta and Paralldox on Worldlines

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

Very Positive
$9.99
Feb 3, 2026
Steam ↗
Reviews
275
Very Positive
Positive
97.1%
267 positive
Followers
753
Est. WishlistsestiProxy: followers × 12 (industry heuristic)
9K
Est. OwnersestiBoxleiter method: reviews × 32
8.8K
Est. RevenueestiEst. owners × ~62% of list price
$54.5K
Price (US)
$9.99
Release
Feb 3, 2026
About
  • 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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★ Reviews
97%
Very Positive
275 total reviews
267 positive (97.1%)8 negative
Genres
Features
Custom Volume ControlsFamily SharingFull controller supportKeyboard Only OptionPlayable without Timed InputSave AnytimeSingle-playerSteam AchievementsSteam Cloud
Tags
3DAbstractCasualCuteDifficultFemale ProtagonistIndieLogicPuzzleSingleplayerSokobanStrategySurrealTime ManipulationTop-Down
Developer
Platforms
Estimates — owners use the Boxleiter method (reviews × 32), wishlists proxy followers × 12, revenue uses ~62% of list price × est. owners. These are rough industry heuristics, not official data.
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