Open Source JavaScript Games: 100+ Examples for Vibe Coders

Whenever I want to build a game, the hardest part isn't the code. Its figuring out what the code should even look like. Game logic is weirdly specific: collision detection, scoring, keyboard input, level transitions. Even a basic 2048 clone has more moving parts than it looks. The problem isn't that the agent can't write it — its that you don't always know how to describe exactly what you want.

The best shortcut I found: point the agent at a working game that's similar to what you're building. Skip the abstract description and just say 'I want something like this — here's the source code'. And that's where this list comes in.

Awesome JS Games is a curated catalog of 100+ open source games written in JavaScript and HTML5. All of them live on GitHub with full source code — adventure, arcade, puzzles, strategy, shooters. There's Pac-Man, 2048, Blitz Tactics (chess puzzles), a multiplayer UNO clone, Ancient Beast (a turn-based strategy), and even a developer portfolio built as an interactive 2D game. The whole list is organized by genre, which makes it pretty easy to scan. Licensed CC0, so everything is freely usable.

1What's in the collection

A big chunk of the games here came from js13kGames — a competition where developers build browser games that fit in 13 kilobytes. That constraint forces everything to be tight and understandable: no heavy frameworks, no build pipelines, just clean HTML5 and JavaScript. Which means the source code is actually readable — well, readable for an agent. The list also inlcudes bigger projects like Ancient Beast, a full multiplayer strategy game with real-time online matches, and UNO with full lobby support. Beyond the games themselves, the catalog links to extras like the Google JavaScript Style Guide and Chrome Experiments — a showcase from Google of experimental browser-based work.

2How to use it as a vibe coder

You don't need to read the source code yourself — thats what the agent is for. The workflow that actually works for me is simple. You browse the list until you find a game that's roughly what you want to build. Copy the GitHub link from the list. Then describe your version to the agent and include the reference link. The agent reads the source and adapts it to your description.