C4 – Connect Four, with AI
C4 – Connect Four, with AI launched on January 14, 2015 with 48 votes and more than 90% of that year's launches. The site was still online in September 2026, 11 years on.
In plain words
C4 is a digital version of the classic Connect Four game featuring AI opponents. Launched in 2015, it allows players to compete against computer-controlled players at varying difficulty levels. The game is designed for anyone looking to play Connect Four online without needing a physical board or another person present. It's built as a browser-based application accessible through its GitHub Pages website.
written from the facts on this page · September 2026
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