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Connect 4
Drop discs. Make connections. Climb the ladder. Start with Bella (she might drop pieces in random columns), test your skills against Coop, then prepare for Bentley's ruthless precision. Four in a row wins, but can you get four in a row against the legendary champion?
Play
Three dogs, one engine at three depths. Your pick is remembered across the arcade.
How this game was built
Every game in the arcade is built from scratch by an AI coding agent as a test of what current models can ship.
- Framework
- React 19 + TypeScript + Vite
- First built
- November 28, 2025
- Last rebuilt
- February 1, 2026
- Built with
- Claude Opus 4.5
- Latest change
- The Feb 2026 rebuild added 89 unit tests for the game rules and AI strategies.
Want to build or change your own? The whole game is on GitHub. Fork it, run npm install and npm run dev, and the board is yours to change: the rules, the three opponents, the art, or the whole look.
- Three opponents with escalating difficulty
- Character-driven victory messages
- Smooth disc-drop animations that feel just right
- Detailed stats to track your dominance (or failure)
- Sound effects that go *clunk* in the best way
- Keyboard shortcuts: 1-7 to drop, because clicking is for casuals
- Challenge friends to beat specific opponents
