Hacker News Games

Real-time 3D multiplayer arena battle: buy tanks, helicopters and turrets and fight another player in your browser

Overlay DDR-style arrows on any YouTube video and play with keyboard, controller, or USB dance pad

Two-player bot-programming contest on Conway's Game of Life; code a bot to outscore your rival

Collaborative word search on one shared, effectively infinite grid; words may turn corners but never run diagonally.

Two-player Pong on a 55-LED strip: a light travels the strip and each player presses a button to return it; first to 5.

Buzzword-bingo party game: build a custom card of phrases and tick squares in real time as they happen

Play chess in the browser against a friend over WebRTC using a shared room code, no accounts needed

It also features "Country Quest," a websocket-based multiplayer game where players race to identify a country from clues. The backend uses Node.js/Socket.io and the frontend is React. It's free and open to play.

Multiplayer exploration of a procedural world: you only see and chat with players within 100 pixels of you.