Number Merge is a tile-sliding puzzle game played on a 4×4 grid. Each turn you slide all tiles in one direction — up, down, left, or right — and every pair of identical adjacent tiles collapses into a single tile with double the value. New tiles (always a 2 or a 4) appear automatically after each move. The objective is to create tiles with ever-larger values, with the classic target being 2048, though skilled players push far beyond to 4096 or higher.
The game ends when no legal move remains: the grid is completely full and no two neighbouring tiles share the same value. This makes every move consequential. Sliding tiles is easy; predicting how a chain of merges ripples across the board is where the strategic depth lives. Two tiles merging into one frees space, which allows more merges, which creates cascades — learning to engineer cascades is the turning point between a 512-tile score and a 2048-tile score.
Number Merge runs entirely in the browser with zero installation. The layout is fully responsive — the tile grid scales to fit any screen size, and swipe gestures work on mobile and tablet as naturally as keyboard arrows on desktop. Scores are tracked per session, and you can restart any time with the New Game button to start fresh from a blank grid.
Choose one corner — top-left is conventional — and never slide in a direction that moves your highest tile away from it. Build a descending value chain along the edges and all merges flow toward the anchor tile.
Arrange tiles in a descending zigzag: top row highest-to-lowest left-to-right, second row continues right-to-left, third row left-to-right again. This keeps every tile one step from a merge partner.
When a slide scatters your tile chain, do not panic-slide to fix it — each recovery slide usually makes positioning worse. Accept the chaos and look for the nearest merge to free space.