2048 is a sliding-tile puzzle on a 4×4 grid. Every move slides all the tiles in one direction; tiles with the same number merge into one worth double, and a new 2 (or occasionally 4) appears in an empty space. The goal is to build a single 2048 tile before the board fills up — and then, if you like, to keep going.
Gabriele Cirulli built it in a weekend in March 2014 and it became one of the most-played games on the web within a month. The version here is the classic: same grid, same rules, with a score and a best score saved in your browser. It is the game people play under a desk, on a bus, or in a meeting they should be paying attention to.
On a 4×4 board the theoretical maximum is 131,072, which requires a near-perfect game and a lucky final tile. 4096 and 8192 are realistic goals for strong players; most people who reach 2048 are happy.
There is luck in where new tiles appear, but strategy dominates: the corner-and-snake method wins far more often than random sliding. A good player reaches 2048 most games.
Both. Swipe on a phone; arrow keys on a Chromebook or laptop. It is one of the lightest games on the site and runs anywhere a browser does.