Flood

Flood is a color-unification puzzle where you turn the entire grid into one color by repeatedly flood-filling the top-left region, using as few moves as possible.

Flood is a vibrant and strategic puzzle game that challenges you to unify an entire grid into a single color using the fewest possible moves. Starting with a patchwork of colored squares, you repeatedly “flood-fill” the top-left corner—each time changing its entire connected region to a new color of your choice. With every move, the colored area expands by absorbing adjacent squares of the target color, gradually overtaking the board.

The catch? You're given a strict move limit, and success requires planning several steps ahead. Choosing the wrong color early on can trap you in inefficient cycles, while optimal play exploits color adjacencies to maximize growth per move. Despite its simple rules, Flood offers surprising depth—blending elements of graph theory, greedy algorithms, and spatial reasoning into an accessible, turn-based challenge.

The game features multiple grid sizes and difficulty levels, making it enjoyable for casual players and logic enthusiasts alike. It's known for clean design, guaranteed solvability, and no reliance on luck or guessing.

Try to make the entire grid the same color within the given number of moves by repeatedly flood-filling the top-left corner with different colors.

Click on a square to flood-fill the top-left corner using that square's color.