Game Foundry

Sprites, sounds, palettes, fonts, tile maps, vectors, AI generators, and prompt-to-code tools. Open-source forks and provider APIs, woven into one browser page.

[Game Foundry @GameFoundryNet]

Develop and publish your vibe-coded games direct to https://t.co/wvcCktuIoE

With 34+ tools to assist with art, audio, VFX, code generation, translation & testing, Game Foundry offers an all-in-one suite for game dev.

Connect your LLM or choose from all the latest models.

[Mitch @mitchellhynes]

We did it! 120 FPS in browser

[Game Foundry @GameFoundryNet]

@mitchellhynes Publish on https://t.co/wvcCktuIoE via MCP connection

[CHRIS FIRST @chrisfirst]

Fallout: New York, a full Fallout game you play in your browser, built with Claude Opus 5.5.

Quests. Dialogue trees. V.A.T.S. A working Pip-Boy.

Zero texture files. Zero sound files. Every building, weapon, face and sound is generated by code.

[Aman @mdaman010]

Sonnet 5.5, the Fortnite test.

I was NOT ready for it to one-shot something this close to the real game. 🤯🔥

[Timothée Le Borgne @Tim_LB]

PEOPLE, IT'S TIME.

Opus 5.5 vs Sonnet 5.5 on my TinyWorld Benchmark.

I am BLOWN AWAY.

Sonnet 5.5 is almost at the level of Opus for... 20% of Opus' cost, and it's WAY faster.

$0.96 vs $4.79
10.8min vs 22.7min

Well done @AnthropicAI !

(Link and prompt in the comments)

[S @Rubzem]

The game I built yesterday with 1 prompt got 4,500 plays & 360k views in less than 1 day. Using Opus 5.5 & @threejs on @TesanaAI.

So I decided to keep building on it. For my second prompt I added dynamic & seamless space battles. Jump into your spaceship, fly out of the atmosphere and straight into a galactic war with massive juggernaut ships.

Dog fight through the battle, then leave the fight and seamlessly fly back down to the planet and keep exploring.

And this is the power of Tesana. You can create something like this in an hour and then just keep building on top of it. Add whatever you want.

New planets, enemies, weapons, quests, mechanics, entire systems. Or make it a space pirate game?

You can basically start with an idea and keep turning it into whatever game you want without knowing how to code.

[Tiger Abrodi @TAbrodi]

opus 5.5 built this game with me in 2 days.

now my friends and i can't stop playing it.

[Higgsfield AI 🧩 @higgsfield_ai]

Claude Sonnet 5.5 is getting REALLY good at building games.

A 40v40 shooter with airstrikes, built with Higgsfield.

[Game Foundry @GameFoundryNet]

@ericmaskfr Try opus 5.5 connected to https://t.co/9ezvl9PyPK

[Izkimar @Izkimar]

League players, DOTA players, HoTS players. I need you in the same lobby for a minute.

I just got Opus 5.5 to build a 3rd person MOBA, then added heroes from all three games.

Li-Ming and LeBlanc are both playable. So are Rubick, Axe, Thrall, Stitches, Kael'thas, Thresh and Ezreal. Full action combat: dodge roll, double jump, jump over projectiles.

Which hero goes in next? It's live below 👇

[Three.js @threejs]

19M npm downloads / week 🚀

[Jurly @jurlycat]

The asset pipeline is becoming code.

Willowmere was built with Claude Opus 5.5:

• No PNGs
• No 3D model files
• No audio samples

Every object is generated procedurally with Three.js, while the music and sound effects are synthesized in-browser through the Web Audio API.

Game design still needs taste.

But the production bottlenecks are disappearing fast.

[gandamu @gandamu_ml]

I had Opus 5.5 create a player and tools for Another World's approach to animation.
.. and also had it create a realtime video for Kavinsky-Nightcall starring Lester from Another World driving to the lab. With crude compression, it's <250KB for bin+data. Audio is larger.

[Luis Bizarro @LuisBizarro]

I’m honestly shocked with Opus 5.5 on how easy it is to just copy people’s work and output anything, feels distopian for some things.

From this tweet, I just cloned the repository and asked this: “can you create a new project with the title Evangelion that uses the same premise, but uses a song [Name of Song] from my desktop? Please all the interface needs to match this Google Search with Evangelion UI for the reactivity: [Google Search]. Add 10-15 different visualizations”.

No technical instructions at all and just asking based on a Google Search, not even copying the images properly or “directing the AI” based on the previous tweet. The output after 15 minutes is great. That just makes me skeptical that engineers won’t be just replaced by creatives in many fields of web development.

https://t.co/jXorkb3wSa

[Pomerania Games @pomeraniagames]

What astra 6 built and what opus 5 built. Which one do you like? #astra #openai #cloude #antropic #aigame #opus

[Game Foundry @GameFoundryNet]

https://t.co/nhaSpXi95W

[Matteo V. @teovito]

I take back my statement that “Anyone can build a game with AI.”

After 256 prompts building Top Tennis, I think people underestimate the person giving the instructions. One example from a prompt I wrote for Top Tennis:

“i feel like the only way to score is going under the net or waiting for the CPU to make a mistake. there should be other ways. a deep ball should push the opponent behind the baseline, leaving space for a drop shot. after a difficult return, it should take longer to recover. changing direction should cost it time.
give the CPU a reaction delay before it responds to my shot. it shouldn’t know where i’m aiming before racket contact. when it changes direction, make it decelerate before accelerating the other way.
make return quality depend on positioning, incoming ball speed and preparation time. a stretched player running at full speed shouldn’t hit with the same accuracy and power as one waiting in position.
look at player speed, acceleration, court size and ball speed together. compare how long the ball takes to reach its destination with how long the opponent needs to get there.
test specific patterns: deep ball then drop shot, wide crosscourt then down the line, and hitting behind a moving opponent. check whether they create real openings without making every combination an automatic winner.
beating the CPU should feel like you’re learning how to play tennis. analyze this deeply before changing anything.”

[Game Foundry @GameFoundryNet]

@The_Alex Now try https://t.co/wvcCktuIoE

[Game Foundry @GameFoundryNet]

Play as a gibbon in the aztec jungle in Ozomatli the Aztec Monkey! Developed in Game Foundry & Claude Opus 5.5 https://t.co/N5pmHNvrNl

[Fabiano Firmo @FabianoFirmo]

Opus 5.5 to build & port 3 procedural buildings from Blender geometry nodes to the web.