The GitHub
for game code.
Your models are
guessing at game code.
Cosmire is a library of release-quality indie game codebases — documented, licensed, and forkable. Find the systems you need. Fork them. Stop starting from zero.
Cosmire is a library of release-quality game code — documented, licensed, and ready to put directly in context. Give your models something real to build from.
Every game dev
is starting from zero.
Models can't build well
from what they've never seen.
If you've ever looked for an open-source game to learn from, or a solid up-to-date template for the genre you're building in, you already know this: the options are ancient, genre-limited, or IP-encumbered. The code that would actually help you is private.
So every developer rebuilds the same systems from scratch — game loops, collision, state machines, entity management. Work that's been done a thousand times, invisible in a thousand private repos.
Months of reinvention before you write a line of original gameplay. The reference code you need exists — it just lives in the private repos of games that shipped and moved on.
Ask a code model to build a game. Watch what comes out. The architecture is improvised, the state management is a mess, the patterns are wrong. Models have never seen real game code — so they guess.
Your users spend hours debugging what the model should have gotten right. Context windows fill with patches instead of product. Games plateau at "technically runs." The ceiling isn't the model — it's what the model has never seen.
Game code — real, release-quality, structurally interesting game code — is almost entirely absent from training data. It lives in private repos and behind EULA-restricted engines. No one has fixed this. Cosmire does.
Real game codebases.
Documented and forkable.
Real game code.
In context. Right now.
We find the games that should be more famous than they are — jam winners, hidden gems with devoted communities, games with a few dozen glowing reviews that should be thousands — and pay developers for commercial codebase licences. Every game in the library is worth studying.
Put a documented, licensed game codebase directly in your model's context window. The model knows the systems. It builds from something real instead of improvising from nothing. The library is the missing piece.
Documented
Full gameplay system breakdowns — every codebase structured so you can find the system you need, understand it, and fork it without reverse-engineering from scratch.
Every system labeled, explained, and structured for clean model consumption. Put exactly the right code in context — no noise, no guesswork.
Licensed
Commercial use. Clean provenance. Acquired directly from the developers who built the game — not scraped, not grey-area open source.
Commercial use and training rights. Acquired directly from developers. No IP risk for your product, your users, or your training pipeline.
Forkable
Pull individual systems, not just whole games. Engine-agnostic. Modular. Built so you can take exactly what you need and leave the rest.
Individual systems or complete codebases. Engine-agnostic and modular — structured so models can reason about pieces without carrying the whole thing.
Built by people
who hit the wall.
We didn't read about this problem. We hit it ourselves — building games, studying codebases, and searching for reference code that should have existed and didn't.
We didn't read about this problem. We hit it ourselves — building games, watching models guess at architecture they'd never seen, and running into the same missing source material every time.
Jason has spent years inside the indie game community — playing, building, and studying what makes games worth studying. He knows which codebases are the hidden gems. He hit the same wall this library is built to fix.
Jason spent years inside AI game development building games and watching every developer — beginner and expert — hit the same ceiling. He's seen firsthand what happens when there's no real game code to draw from. He hit the same wall this library is built to fix.
Hotaka has worked through the licensing infrastructure that underpins this kind of business from the inside. He also has native Japanese fluency. We have direct access to Japan's prolific indie scene!
Stop rebuilding systems
you've seen a hundred times.
Your models shouldn't
have to guess.
Cosmire gives developers a library of release-quality game code to fork and build from — documented, modular, and ready. Access is coming. Get in early.
Library access for AI game dev platforms, codegen tools, and model providers. Get in before general availability.
Your game is worth
more than you think.
If you placed well in a competitive game jam, shipped something with a few dozen reviews that should be thousands, or built a game with a small but devoted community — we want to talk.
We pay $500 or more for commercial codebase licences. You keep all rights to your game. We handle the documentation and everything else. Your codebase joins the Cosmire library — the foundation developers build from instead of starting from zero. All you have to do is say yes.
- Paid upfront — no royalties, no revenue share
- You retain full rights to your game
- We handle all documentation and refactoring
- We're looking for hidden gems — quality over popularity
Tell us the game name or itch.io link, the engine, and anything else you think we should know. We respond to everything.