Connect Four

About Connect Four

Connect Four is a classic disc-dropping strategy game where a single move can win or lose the whole board. Your goal sounds simple: get four of your discs in a row, in any direction, before the AI does the same. The catch is the opponent. This version pits you against a deeper-searching AI that reads the grid several moves ahead, punishing lazy stacks and setting quiet traps of its own. Every column you fill is a commitment, so the real fun lives in the tension between offense and defense as you try to out-think a machine that is always counting.

Playing is instant and intuitive: click any column and your disc drops to the lowest open slot, exactly like the tabletop original. Line up four discs horizontally, vertically, or diagonally to win the game and clear the level. Progress runs across 15 levels of steadily rising difficulty, and the pressure comes from the AI, not fiddly controls. Early boards let you learn how threats build; later levels give the opponent a deeper search, so it blocks your setups faster and forces you to create two winning threats at once. Losing a game costs a life, and three losses end the run, so each match matters.

Winning consistently is about reading double threats and never giving the AI an easy diagonal. Control the center column early, since it feeds the most possible four-in-a-rows, and watch for moves that would hand your opponent a free win on top of your stack. As the levels deepen, plan two or three drops ahead and force the AI to defend so it cannot attack. Connect Four plays free right in your browser on desktop and mobile with no download or install. Sign in free to save your progress across devices and put your name on the all-time top-15 leaderboard, then replay to climb higher and beat your best run.