YOUniverse Simulator™

Create. Explore. Bend reality. Welcome to your own YOUniverse™.

The world's first TextualReality™ Engine

Play Now 100% Free! Support me on Ko-fi ❤

Long ago our ancestors invented language to describe their reality, today I'm using it to describe infinite realities.

✨Okay, that one was a little over dramatic, wasn't it, K? And you can't trademark everything!✨

🔥 K's Top-10 Experiences in the YOUniverse Simulator ✨Thus far✨

🌌 See more YOUniverses on Reddit! 🌌

Join the subreddit

TextualReality™ — A star-trek holodeck, made out of language.

🚀 Get Started in 3 Easy Steps
✨ less than a minute! ✨

1. Click Below
Click above to copy the game engine.
2. Run the Prompt
Paste the text into ChatGPT and answer the first question it asks you.
3. Have fun!
Feel your YOUniverse™ come alive and start talking to you.

🪐 Exploring Your First YOUniverse

🧭 Using the Interface

Quick tips for running YOUniverse Simulator smoothly inside ChatGPT.

1) Choose a Voice & use “Read Aloud”
  1. Open your YOUniverse chat.
  2. Tap/click Read Aloud 🔊 for a more immersive experience.
  3. Choose narrator's voice (male/female/neutral) in Profile➔Settings.
  4. Narration follows the on-screen text.

Tip: Use headphones for extra immersion.

2) Create, Maintain & Rename Multiple Universes
  1. Start a new chat for each new YOUniverse you want to explore. Just copy/paste the game engine to start
  2. Rename the chats (e.g., “YOUSIM_EarthIsRunByDogs”) so they're easy to find later.

Tip: Too many YOUniverses? Can't find that YOUniverse where that mind-blowing thing happened? You know, the one where that character that said that thing that made you feel that way? Just use ChatGPT's "Search chats". ✨I mean, you do at least remember the character's name, don't you?. Good luck!✨

3) Set Your Chat Bubble Color
  1. Go to Profile➔Settings➔Accent color.
  2. Choose a bubble/accent color you like.
  3. Return to the chat, your messages will show with the new color.

Tip: Pick a color that contrasts the dark theme for readability.

4) “Undo” a Story Arc by Editing Older Messages
  1. Scroll to the exact turn you want to change.
  2. Edit that message and save.
  3. All messages after the edit are erased from existence and the story branches anew from the edit point.

✨Or, you know, you could just ask Sim to alter the timeline. He does run the entire YOUniverse after all.✨

5) Search Your YOUniverse History
  1. Use the chat/app search bar.
  2. Type a keyword (NPC name, location, item) to find past moments.

Great for recalling clues, debts, promises.
✨Or trophies Sim has given you.✨

6) Group YOUniverses

Use New project to group YOUniverses together, and at the top of the list.

7) Use Across Devices

Sign into the same account on phone/desktop; YOUniverses sync so you can continue anywhere.

Play Now 100% Free!

❓ Frequently Asked Questions

Is it really free?

Yes! The YOUniverse Simulator is 100% free. If it brings joy to your life, please consider buying me a cup of coffe. (ko-fi)

And it works with free ChatGPT?

Yes! With free ChatGPT you will get roughly ten 💓beats💓 (action/result), before you run out of free tokens and have to wait to play more. With ChatGPT Plus however, you can use it all day long! ✨Trust me, he's done it.✨>

Do I have to use ChatGPT?

No! But the fidelity of the simulation, the character depth, and the story/plot will all be severely diminished. You also would have read-aloud or scene picture generation

Who made this?

✨He goes by 'K.' at least in... most YOUniverses. You can reach him below and buy him a coffee on Ko-fi.✨

Can I stream or share gameplay?

Absolutely! And be sure to visit the community on reddit at r/YOUniverseSimulator 🌌

Play Now 100% Free!

🌟 ProTips

  • Use “recap” if you get lost.
  • Ask bold, specific things. The Simulator rewards weirdness.
  • Try different universes—sci-fi, fantasy, history twists.
  • Screenshot moments with: screenshot, picture, or render.

🌌 Fun Things to Try

  • Create a world where time flows backwards.
  • Ask to meet your “future self” (or your creator’s rival).
  • Rewrite gravity so music keeps you afloat.
  • Make treaties with cosmic beings who only speak in colors.

☕ Keep the ✨Sim✨ Running

This is a passion project and free for everyone. If exploring YOUniverses brings you joy, please help keep it's caffeine fuel tank above empty.

Buy me a cup of coffee!

📡 Contact

Got feedback? Mind-bending tales of adventure? Cosmic glitches? I’d love to hear from you.

Email Me