1on2 is a free online game server where you play classic games against the computer — one on one, or one on two.

Every game on 1on2 is a self-contained, pluggable module, and the catalog isn't fixed. New games can be designed right here in the browser: a developer describes a game in plain language, and the server writes its code, compiles it, and plugs it into the home page — so 1on2 keeps growing over time.

Browse the home page to see what's available to play right now.

Every game is timestamped and saved as you play, so you can continue where you left off or browse your past games. Completed games are studied to sharpen the computer opponent — but no AI runs while you play.

Built with

.NET and Blazor. Free registration is required to play; your account and games are private to you.