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The October inflection point for vibe game development

October 2026 marks a turning point for vibe coding computer games, following the November 2025 shift where coding agents became reliable daily…

By Vane October 28, 2026 3 min read
The October inflection point for vibe game development

October 2026 marks a turning point for vibe coding computer games, following the November 2025 shift where coding agents became reliable daily drivers for software engineers.

Claude Opus 5.5 shows meaningful improvements in 3D modelling, music generation, and game design. Models have been able to create something that looks like a game for quite a while now. The challenge has been getting to a game that is actually fun to play.

Game design is a deep subject area. Creating a novel, compelling gameplay loop which challenges players at the right level and provides a satisfying learning curve is a fine art. I did not think the models could do it.

Then I tried telling Claude Opus 5.5 to make it a lot more fun and it did.

In the past few weeks I have vibe coded four games that I have genuinely enjoyed playing. I attended Foo Camp in Berkeley over the weekend and met several people who were having similar experiences. Building games that play well is shockingly easy now. The new challenge is coming up with concepts for games that are novel and delightful and that would not exist without AI assistance.

I have not done an exhaustive study, but my current impression is that GPT-6 Astra is not quite there yet. It can absolutely build a game, but its sense of fun does not match that of Opus 5.5. I expect OpenAI will get there by the end of the year.

Here are the four game projects that have convinced me that the models are now capable of producing fun games with very little guidance. All four are built in HTML and JavaScript and run entirely in the browser.

Tree Appreciator

The smallest game I found to be genuinely delightful is Tree Appreciator. I used the regular Claude chat interface for this and it did not even need Claude Code.

I built this on a whim while we were driving along Skyline Boulevard looking at trees. My prompt was:

Build a three js game called “Tree appreciator” – it shows you two algorithmically generated trees and the game mechanics is about appreciating the differences between them. Think hard about how to make sure it is both fun and beautiful.

I have found that telling models to use three.js works really well. Claude does not have its own image generation model but is capable of building full-color 3D models that look and feel excellent.

This game required no iteration or follow-up prompting at all. I got the game in a single shot. It gave me back a charming little mobile-friendly spot-the-difference game. You can play that here. Here is the chat transcript that built it.

Screenshot of a web game called Tree Appreciator, a spot-the-difference puzzle showing two side-by-side 3D renders of the same leafy green oak on a grassy hill at golden hour, with orange low-poly hills and a hazy sky behind and pale rocks in the grass. The left tree (Fig. i) has a small brown-and-orange bird perched near the top and a cluster of red-orange autumn leaves in its left canopy; the right tree (Fig. ii) has a small orange squirrel on a branch right of center. Header text:

It is pleasingly relaxing. The graphics are fun, and collecting trees that you have completed in a herbarium provides a nice, cosy sense of accomplishment.

Emberwick

This was a more ambitious project that I again built using regular Claude chat. I started out by building an experimental prototype of an engine for a top-down fantasy RPG:

Build a demo game engine three.js which is a top down (but at an angle) RPG – the player gets to move through the world with one or two companions. Create a fantasy village setting that demonstrates walking around outside and then shows how when the player enters a building the wall between the player and the camera goes transparent so the user can see what is happening

Add some NPCs and plenty of furniture and different types of building some with an upstairs – be creative, make it look great

Here is that first version. It worked really well!

Screenshot of a low-poly 3D top-down fantasy game showing the interior of a cutaway tavern at dusk, with grass, a lamppost and benches outside. Inside, warm candlelight falls on wooden floorboards: a stone fireplace with a figure in a red armchair on a red rug, a blue armchair with an orange cat on it, a long bar with barrels and bottle shelves where a red-haired barkeep stands, a candle chandelier, a cloth-covered table, small round tables with stools and a blue banner with a gold emblem. A group of three adventurers (a white-haired figure in a blue robe, a red-armored figure with a hammer and a green-clad figure) stands just inside the doorway. Top-left panel text:

I was inspired to increase my ambitions:

Make it not so flat – the buildings are great but the landscape itself is completely flat at the moment, fix that

Add basements to two of the buildings with a tunnel system joining them below the village

Add the start of a rocky mountain on one side of the village containing a cave with a sleeping troll

Here is that version.

Screenshot of the same low-poly fantasy game, now in a dim underground cave lit by a campfire with a spit roast, glowing pale mushrooms and blue crystals. A huge green troll lies asleep on a straw bed at top right, surrounded by scattered bones and skulls. The cave also holds a small round pool ringed with stones, a yellow rug, chests, a fenced pen with a sheep, a pile of orange pumpkins and a stone stair down the left side. The party stands in the center: the green-clad figure and the red-armored figure facing the blue-robed figure holding a glowing staff by the fire, who says in a speech bubble

When that produced a good result, I decided to push it all the way:

Now turn this into an actual game – quadruple the size of the playable area, introduce fun game mechanics, add a plot that isn’t too cliche, some twists, a magic system, make it really good

We are back to prompts like make it really good here. Asking for a plot that is not too cliche seemed to work too. It is a bit cliché, but still novel enough that I enjoyed following the story.

Unlike Tree Appreciator, this took quite a bit of additional playtesting and prompting to get to a finished version. This was mainly due to gameplay problems. Things like a character not being in the right place to complete a quest because a different story element had caused them to move to another location.

Here is that final game. It has a full story that takes about 15 minutes to play through.

Emberwick title screen. The 3D village sits in the background. The text reads Every fire in Emberwick was lit from the Hearthstone, and every fire dies at midnight unless it is lit again. Tonight the Hearthstone is gone, the wizard is missing, and the village is sure the troll did it. You came for the festival. Someone has other plans for you. Buttons for: Begin, Build your own places, Restore a save src=

There is even an experimental level editor if you want to drop in your own houses, furniture, and landscape features.

Once it was all working and I had iterated through some gameplay bugs, I played it through from start to finish and found myself emotionally affected by the ending. I am somewhat embarrassed by this, because everything in this game – the graphics, the plot, the characters, the music, the dialog – came from the model. My creative input was pretty much just it is a fantasy village and there is a troll asleep in a cave.

Here is the chat transcript for the final version.

https://claude.ai/share/840e0bc0-a68e-4894-8eec-8f83bd6ade26

Battle Drones

This was the first of the four games I built. It started as a simple shooter concept.

I asked the model to build a game where you control a drone fighting other drones. The initial version was functional but lacked depth. I then prompted the model to add more complex enemy AI and a scoring system.

The final result is a fast-paced shooter that runs in the browser. It demonstrates the model ability to handle logic and state management without direct code inspection.

Screenshot of a browser-based drone shooter game. A blue drone flies in the center of a grey grid. Red enemy drones circle around it. A score counter in the top left reads 'Score: 450'. A health bar is visible at the bottom. src=

Pumpkin Farmer, aka Quarter Sun Cove

This project started as a simple farming simulation. The model generated the core mechanics for planting, watering, and harvesting.

I then asked the model to add a seasonal cycle and a village economy. The resulting game features a changing landscape and interactions with NPC villagers.

The graphics are simple but

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