Connect Four is the beloved two-player strategy game where you drop colored discs into a seven-column, six-row vertical grid. The first player to connect four of their discs in a row — horizontally, vertically, or diagonally — wins. It takes seconds to learn but has surprising strategic depth. Play against a challenging computer AI that thinks several moves ahead, or challenge a friend on the same device in two-player mode. The key is to build threats in multiple directions at once so your opponent can't block them all. The game automatically detects four-in-a-row the moment it happens, calls out the winner, and lets you reset for an instant rematch. It works beautifully with both mouse and touch. It runs entirely in your browser with no downloads and no account, and it is completely free. Think ahead, block your opponent, and claim the winning line. Strategic, fast, and endlessly replayable.