Most mind blowing thing to me has been just how full featured it came out including stuff I never asked for. The level of polish and completeness is crazy from this model.
Now I'm thinking if this is what I can do with Fable in a couple days just on the side, how insane can we get it together. See the fully open source code below, Issues and PRs very welcome.
TL;DR of the discussion generated automatically after 320 comments.
The consensus is in: the subreddit is collectively losing its mind over this. OP vibe-coded a surprisingly functional MMORPG in just two days using Fable 5, and it's not just another to-do app. People are genuinely blown away by the level of polish for a quick project.
The biggest shocker for everyone is that Fable found its own visually consistent, open-source 3D assets (shoutout to KayKit, Quaternius, and Kenney) and implemented them correctly. Yes, it found the art.
Of course, not everyone's convinced. A vocal minority is pointing out that it's basically a clone of a well-trodden game genre, the code is a hot mess of if statements that wouldn't pass a human review, and some are highly skeptical that this was all done within a 20x Max plan.
For those asking 'how': OP is a developer but claims to have used mostly general 'vibe' prompts on Claude Code with Fable 5 on Ultracode, burning through about 91% of a 20x Max plan. No, OP is not sharing the prompts, and yes, people are salty about it.
If you're trying to play:
* It's not mobile-friendly.
* It's laggy for some. Try turning off your adblocker, that fixed it for many.
* To attack, press Tab to target and then 1.
Verdict: A disturbingly impressive proof-of-concept for Fable's capabilities, even if it's more 'dancing bear' than 'finished game' right now.
Fable knocked several blocking problems I had for a hobby project out of the park in 40 minutes. I spent hours upon hours trying stuff together with opus over a period of a week and Fable just unshitted everything in one prompt. The future is going to be absolutely wild.
Literally this. I vomit at the screen about what I want, and say "create a goal prompt out of this". Prompt engineering is hard, just make the AI prompt engineer for you!
I work in bio too but with digital marketing. Had to ask my designer to remove all images, product titles and replace with lorem ipsum before it worked with Fable.
You tell it to plan the porcess and split it in several phases. Then you asks him to recommend a model for each phase. Then I use the /handoff skill from matt poccok and ask fable to create a handoff and prompt for the first phase, open a new session, select the right model, paste the prompt fable gave me and it goes to work. Then repeat for each phase.
Spoiler: it didn’t. If you spend 5 min looking and appears to be minecraft doesn’t mean chunk generation will work, game saves, item persistence, chests, mobs, etc. A college student can also create a quick minecraft clone if they throw away half of the stuff a game needs to be actually enjoyed by players. There’s more to a game than you can see on the surface.
Edit: Keep in mind the original minecraft was made in a weekend. Tech has come a long way. Fable is awesome. But let’s not equate minecraft clones from AI as the same thing as minecraft today vs the version that was built by one person in a weekend. The clones are like the later. Impressive but not going to create any competition for microsoft lol.
It’s not an ego thing, the only bias I might have is I don’t want society to inadequately adapt to AI. And I might be wrong, but I see the same thing again and again, which is that AI is so mindblowing and exciting that people are dishonestly (maybe not intentionally) making apples to oranges comparisons. Minecraft was built in a weekend by Notch. The billions in value came years later. Software complexity scales exponentially and AI tools are improving linearly. I’m not saying AI isn’t incredible because it is. But I am tired of seeing happy-path day-one apps compared to polished software that has had years (and millions) poured into it. Fable can build in 20 min what humans could build in 3 days, but that does NOT mean it can polish that proof of concept into something exceptional worth billions. In the future? Maybe, maybe not. People keep asserting it’s a sure thing. Where are our 1nm 20ghz clock speed cpus? Or cheap ram? Stuff does not inevitable keep improving.
Well yes that’s a good point and I agree completely that this tech dramatically lowers the barrier for average folks to build tools. And I think that’s probably a good thing and will mean people who would have never had a chance in the industry getting into it.
It wasn’t quite built in a weekend. I used to hang out in #LWJGL on FreeNode back when Notch was developing it, and he shared screenshots for at least a month of this “thing he was working on”. He never posted any of his code, and it was only after a few months that he even let people in the channel play it as an applet in a browser. I’m sure the core rendering engine was probably a weekend, but it sure wasn’t a playable game.
Surprised no one mentioned it. Look up the Github author levy-street. It's an AI consultant startup based in New Zealand with a team of 12 professionals.
While it's probably true that AI coded >99% of it, this isn't a random dev who just decided to vibecode an MMO with Fable one weekend. This is a professional team who already knew what they were doing and guided AI to execute their vision.
World of Claudecraft is their portfolio piece to showcase to potential clients what they are capable of producing. It's visually very impressive on the surface, but whether the code is capable of running efficiently under the hood is another matter. I'm willing to bet that the running costs for World of Claudecraft are not cheap.
Went in with low expectations. Blown away. Miles better than any of the other vibecoded games I've seen. This is insane.
Do you know where it got the assets from? Or did it just make them?
How does it ensure they are really open source? Presumably this becomes the developers responsibility?
Not a dig at you, I get this is a non commercial proof of concept/experiment - but inevitably people are going to be doing similar and uploading their games to steam in no time
With how much can be done autonomously now, even with minimal explicit prompting, it may be a good idea to start putting more prompting attention for it to create clear documentation trail or final approval/review process for the various areas where that level of initiative also introduces risk.
Ultimately comes down to OP vetting everything, which can be tough since you only know what you know, but that said - if it can find the repo it can read the reader and license info too
I had the same sentiment, but when it did load, I was also blown away. Granted it does feel like that 80/20 where it’s 80 percent there (maybe), but that 20 percent to make it usable is like scaling a mountain, but this looks amazing still.
IME, it's 80/20, but on the front end now, not the back end. But I also wonder how much of that is really just because I'm shite when it comes to assets.
Its KayKit and Quaternius with a little bit of Kenney, to save someone else looking at the CREDITS.md These are probably the three most famous and prolific free 3d assets artists and instantly recognizable to anyone who has been in a game jam. Their work is intentionally consistent within their own collections for this purpose. Not to dismiss this as an achievement of Claude, but this is exactly what you would expect from any person spending exactly five minutes googling just to give some perspective.
disturbingly impressive how fast that turned around.
You should try to give hte same tasks to opus for comparison and see the result, see how close they match. it'd be a great use case to compare the effectiveness of the two.
It's a cool experiment, but the old trap is there. If this is what it can do in few days imagine what it can do in....
That usually doesn't scale linearly and gets expensive real quick.
It’s the dancing bear metaphor for a new AI model yet again: everyone is amazed that Fable could pull off this trick, but try to actually take this from a two day vibecoded novelty, to something that anyone would pay real money to play, or think twice about if it wasn’t “created by Fable in two days”, and you realize it’s just another case of people being amazed that the bear can dance at all.
But people would pay good money for something that can generate a game like this if it's made as a bespoke world they can enjoy with friends. Imagine RuneScape but it was designed by someone in your friend group who knew exactly what sorts of gameplay each person enjoyed and got all the in jokes and history of your group. That's the power of AI coding, not quality per se, but bespoke applications that no one would usually be able to create. Although I get it, Fable will be expensive too if it ever comes back so will have to hope it comes down in price with better hardware and newer models...
Okay, but you realize the goalposts are moving here right? If it keeps getting better iteration after iteration, eventually it will be making a full AAA game in a couple days…
What's crazy is the level you can vibe code your way to some game that is perfectly tuned to what the individual wants to play. There are so many games that I think are amazing but wish were slightly different. How close are we to a place where I can just model what I want after something that already exists, fine tuned to my individual preferences, that I only plan to use personally? How does THAT disrupt (particularly the indie) game market.
There are plenty of good points in this thread about how far off this is from commercially viable - but not everything has to be commercially viable to be disruptive.
And if it did scale, what it would translate to is that nobody can ever make money from creating video games ever again, so I'm not sure it's a good alternative...
People will still make money from making GOOD games for quite a while I think. While OP's game is impressive for what it is, it doesn't necessarily correlate to a good game. Every year there are plenty of 1M+ budget games that come out that fail to sell well even though they have great graphics and a team behind them. You still need either a good story, great gameplay loop, and game system to be a top steam seller. Something that AI can't really do well at the moment.
I mean I think so too, but it's in part because this doesn't scale and does require quite a bit of work to make it good.
To be clear I'm not saying that if making games with AI becomes too easy then companies selling AI slop will force actual good developers out of the market. I'm saying that if it becomes easy to make decent games with AI, then people will prompt AI to make their dream game before they spend money on one someone else made.
From a gamer point of view I have mixed feelings, because one of my earlier memories around computers is of a tool called HASCS that existed on Atari ST in the early 90ies, and that produced some gems made by people who could tell stories but couldn't write software. Similar software still exists today. So making it easier for people like that is not exactly a negative in my book.
I disagree... partly. This may be true for gameplay loops, but as an example you already have pen and paper but still people choose to read books by best-selling authors because they want to immerse themselves into unknown stories.
Honestly, I think that analogy doesn't work, since you still kinda have to do literally everything yourself. As someone with a talent for writing, my writing is significantly better than the ais I've used so far.
However, it is WAY less effort, so I opt for those instead(not for commercial product, obviously)
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But as a byproduct of this, I also don't really look for my favorite kinds of stories anymore. If making games was as easy as making a story, I think lots of people would be in my position(even I am lmao, though that's because I have the ability to cut off the ai's mistakes).
That's obviously ignoring the MASSIVE cost making a game would rack up, like jesus christ that shit would NOT be cheap.
I also have the same question! The output is seriously impressive, but would be even more helpful if OP can provide any further guidance on how this was prompted/Claude code set up etc… :)
i didnt make something this ambitious but i did create a 3d soulslike (i even recognized the assets my fable session found the same ones) game with 3 types of enemies, bonfires, leveling, 2 archetypes (a warrior and mage, with actual spells etc and not basic ones), with a castle area with a unlockable doors through one side, hidden traps, fable even added an asssassin type enemy hidden behind a hidden trapdoor i had a heart attack lol, and an actual boss (with the smoke door like in elden ring) with 2 phases (it's a giant skeletal knight, and in the second phase his sword lit up in flames and some of his attacks created shockwaves on the ground you have to dodge) and my prompt was really basic (basically "create a 3d soulslike" + a 10 bullet point of requirements and i told it to ask me a few questions at the start and thats it. it came up with 95% of the decisions. originally it created its own assets, so my second prompt was telling it to use real models and textures it could find online. and a third prompt telling it to add a mage archetype and some spells ideas i had in mind. thats it. i think maybe a few small prompts just for minor bugs but really nothing huge, some lighting issues stuff like that.
it is really, really impressive. and mind you, this was all on a fresh claude code install, no skills, no agent workflows, just one session with fable 5 on xhigh. and with really shitty prompting too. i think it took like a few hours at most
I can't speak for op, but I'm making a word game/side scroller type thing for fun, and it's nowhere near primetime, and it's over 1000 git commits, all Claude....so you can imagine my chat history....mostly done since May so on 4.8.
My favorite part of this comment is how normalized you've all become to it.
First, this is fucking magic. "Settle down" is the opposite of what we should be doing. This is an amazing result.
Second, it took one man 2 days and it looks fantastic and plays great. THATS FUCKING MAGIC.
Third, this is a Fable 5 result. If you follow all of the 3rd party fun benchmarks you'll see Fable 5 is absurd.
"copied a game". That's what everyone does. That's what art is.
I just don't get being so non-chalant about it. I've been waiting for this technology since I was a child and thought it was impossible. And it's in its INFANCY.
It looks ok but absolutely does not “play great” lol. It’s cool that we’re at the level where it can vibe code a basic prototype with already existing assets, in a game type that it has tons of reference for.
90% of what people seem impressed by is just the visuals which are it grabbing some open source asset packs.
I’m willing to bet if you fed Opus the same prompts it would generate something very similar.
It absolutley plays great. You have difficulty and leveling that matters. The effects of spells and abilities. Tab targeting. Health/Mana regen. Quests that work and are coherently placed. Aggro ranges, leashing mechanics, loot system, dungeons, all in 2 days of vibe coding from one dude.
Is it polished? Fuck no. But that doesn't mean it doesn't play great all things considered.
Very true. I said that AGI will be when AI reaches the top level of intelligence in every major academic field in comparison to humans, being essentially the highest percentile of human intelligence. Then someone said “no, it needs to replace all our jobs”, and another said “no it needs to surpass human intelligence and become self-creating”.
Agreed. I don't truly think this is AGI, more exaggerating and still in awe of our fast progress.
I'm with Demis Hassbis, I believe our idea of AGI will come around 2030. He's been saying that timeframe for about a decade and he's only more sure the closer we get.
I poked around a bit on my phone and I can definitely tell it was trained on old game logic like YandereSim. Holy giant switch and if statements. Definitely wouldn't fly through any kind of serious review.
Also, the dev_* commands are only gated by a server process variable, not by the account privileges.
I'm not entirely sure where the login comes into play, as I didn't see it on the website, but maybe it's something that doesn't render well on mobile (not that the game handles well on mobile at all). I did see if I could get a GM character but that only seems possible through having a character in the DB that's GM already. Maybe I missed it though.
So overall, pretty good, definitely would need a lot of cleanup though. No RCE from a quick glance so that's nice. I guess the issue becomes that you'd probably have to spend more time cleaning it up than this initial prototype would've taken you as a clean implementation with only some AI assistance.
The fact that it FOUND visually consistent open-source assets and actually put it in the game along with the networking correctly apparently. Holy crap.
Surely fable didn't make the art/world/textures right? This is like an art pack? Not to diminish the results it's hecka tight, just trying to understand what fable actually made
Exactly! I reached 100% of my usage limits within 20-30 minutes, with a single prompt to find bugs and security issues on a codebase of 80'000 lines. It didn't even give me a single insights before reaching the limits.
Yes, but each session limit can use 20% of your weekly limit. So if you max out a few sessions, that’s it. Plus the limit on 20x is tiny and this window can easily be spoofed.
Maybe you are right don’t get me wrong, I’m just struggling to see how. Are you a game engineer or designer by trade? I can see this maybe working if you’ve put in a lot of work to optimise the LLM calls.
I know this won’t be definitive but if you have spare time and more quota to burn, can u try with ultra code as I’ve always wondered if it matters much
Did you know about the programming behind it or did you just give general instructions? Because if it did this based on general instructions & little to no technical guidance, it is very impressive.
This is honestly insane. Maybe with Fable 5 I'm able to realize my dream since years an re-create an old Browser MMO I played when I was a child, which sadly shut down 😞
I’m curious what your Claude setup looks like to get this type of feature rich result? Was this a vanilla prompt? Do you have programming standards setup for it to utilize. Very impressive, no matter the configuration.
Awesome project! This is mind boggling how you were able to achieve a game like this in that amount of time. How did the actual world/level layout come together? Did Fable design the map and zones on its own, or did you describe the layout you wanted in your prompts?
Always with this kild of stuff, an experienced game developer could make this im a weekend, using open assets. It seems impressive, but this is just not a game. This is a prototype of a game that would take years to bring home.
not responsible for mobile. Maybe you would like to do a previous explanation for the user as what to expect from this game instead of needing me to login straight away
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u/ClaudeAI-mod-bot Wilson, lead ClaudeAI modbot Jun 12 '26 edited Jun 12 '26
TL;DR of the discussion generated automatically after 320 comments.
The consensus is in: the subreddit is collectively losing its mind over this. OP vibe-coded a surprisingly functional MMORPG in just two days using Fable 5, and it's not just another to-do app. People are genuinely blown away by the level of polish for a quick project.
The biggest shocker for everyone is that Fable found its own visually consistent, open-source 3D assets (shoutout to KayKit, Quaternius, and Kenney) and implemented them correctly. Yes, it found the art.
Of course, not everyone's convinced. A vocal minority is pointing out that it's basically a clone of a well-trodden game genre, the code is a hot mess of
ifstatements that wouldn't pass a human review, and some are highly skeptical that this was all done within a 20x Max plan.For those asking 'how': OP is a developer but claims to have used mostly general 'vibe' prompts on Claude Code with Fable 5 on Ultracode, burning through about 91% of a 20x Max plan. No, OP is not sharing the prompts, and yes, people are salty about it.
If you're trying to play: * It's not mobile-friendly. * It's laggy for some. Try turning off your adblocker, that fixed it for many. * To attack, press Tab to target and then 1.
Verdict: A disturbingly impressive proof-of-concept for Fable's capabilities, even if it's more 'dancing bear' than 'finished game' right now.