A guy on r/ChatGPTPromptGenius asked an AI to invent a PC game with zero guidance. No genre, no hints, just “surprise me.” Then he sent the same prompt to a few friends. Everyone’s game came back as a strange mystery with timelines that shift, rooms that rearrange themselves, and old radios and TVs humming in the corner.
Nobody coordinated this. It just kept happening. Spooky, right?
That’s the whole experiment, and it’s a fun one to run yourself. It takes about five minutes, costs nothing, and you end up with a few game pitches you can steal, mock, or build on over coffee.
Why it matters 🎮
When you strip out every instruction, you get to see what a model reaches for by default. That’s a small window into its habits. Think of it like asking a friend to pick a movie with no rules. What they choose says more about them than any list of favorites would.
The original poster’s theory is that the AI struggles with the idea of time, and that this makes it a bit eerie. It’s a fun theory, but treat it as a guess. Another commenter pointed out that if your ChatGPT has memory turned on, your past chats can leak into the answer. So “no context” might not be as empty as it looks. If you’ve spent months asking it about thrillers and puzzle games, don’t be shocked when it hands you a thriller puzzle game.
Results also vary. One person ran the exact prompt and got a game where you play a god who can alter reality. No shifting timelines, no vintage radios. Another got a story about a mysterious 11-second signal that every human on Earth hears at once. A third got “False North,” a reality-bending cartography game. So the pattern isn’t universal, and that’s what makes comparing notes interesting.
It’s also a handy idea generator. If you’re a hobbyist game dev, a writer, or just bored on a Tuesday, you get a free pitch to riff on. A tabletop group can use it to spark a campaign. A writer can use it as a story seed. A teacher can use it to get students talking about what makes a concept feel original versus familiar. Even a “meh” result is useful, because it shows you what the default looks like, and that’s the thing you’ll want to push against when you make something of your own.
How to run the experiment 🧪
- Open a fresh chat. If you can, turn off memory or use a temporary chat so your history doesn’t sneak in. A brand new window with no custom instructions is the closest thing to a clean slate.
- Paste this prompt exactly as written:
Give me an idea for a PC game. I won’t provide any context, preferences, constraints, or guidance. Everything is up to you. Make all the decisions yourself, however you want, based entirely on what you find most interesting, creative, or exciting. Don’t ask me any follow-up questions. Surprise me with an original, compelling game concept, and feel free to be as imaginative and unconventional as you like.
- Read the pitch and note the genre, the setting, and how time is handled. Does the story happen in one place or jump around? Is there a mystery at the center? Does a piece of old technology show up?
- Regenerate three or four times. Look for repeats like mysteries, shifting worlds, or retro tech. Don’t tweak the wording between runs, or you’ll muddy the comparison.
- Share your results in the comments of the original thread, so the crowd can see whether the pattern holds. A quick line like “5 runs, 3 had shifting timelines, memory off” is more useful than a wall of text.
Tips & Tricks 💡
- Test other models. Run the same prompt in Claude, Gemini, or others. Each one may have its own favorite themes, and it’s a good way to see whether the spooky streak belongs to one model or to all of them.
- Compare with memory on and off. This is the cleanest way to check the “it’s just reflecting you” theory. Run it five times each way and see whether the results look different.
- Change the medium. Swap “PC game” for “board game,” “short film,” or “mobile app” and see if the weirdness follows.
- Keep a tally. Write down the genre of each result. Patterns are easier to spot in a list than in your memory. A simple note with columns for genre, setting, and tone will do.
- Build on the best one. Ask a follow-up for a core gameplay loop, a main character, and a first level. Now you have a real pitch doc.
- Ask for the opposite. Once you have a spooky mystery, ask for the cozy, funny, or boring version. It’s a quick way to see how far the model will stretch when you nudge it.
Your turn 🚀
Run the prompt, grab your favorite concept, and drop it in the comments with a note on whether it got weird about time. If your AI gave you something totally different, that’s just as useful to know. Anchors aweigh, and happy prompting!
Frequently Asked Questions
Q: Why did I get a different game than the OP?
The same prompt can land in very different places depending on the model and the session. One commenter ran it through ChatGPT and got a god who reshapes reality just by speaking, with no time travel or shifting geometry in sight. Run the prompt a few times in fresh chats to see whether the timeline pattern keeps showing up for you.
Q: What were the strongest concepts from the thread?
Three ideas stood out. In one, a god-like character’s words change reality, so telling a sick person they’re well heals them. Another is a 2047 story where the world remembers sound and a radio broadcasts your own voice from 19 hours in the future. The third is a map-making game where a location only becomes real once enough people believe an accurate-looking map of it.
Q: Is the time-and-timeline pattern a real AI quirk or just a fluke?
The OP suspects AI finds time hard to handle, which is why every game it dreamed up involved shifting timelines. The thread doesn’t fully back that up, since other testers got reality-warping gods and map economies with no time theme at all. Read the pattern as a habit of one model on one day, and test it yourself before drawing a bigger conclusion.
Q: How do I turn one of these prompt ideas into something playable?
The concepts that stuck with commenters each built around one strange rule, like sound becoming a record of the world or maps making land permanent. Pick the single mechanic that makes your concept unique, then write one sentence about what the player does with it. Build the premise, setting, and story around that sentence, not the other way around.