The basic structure of 2048 is remarkably straightforward. The player begins with a four-by-four grid containing a small number of tiles. Most versions begin with two tiles, usually containing the numbers 2 or 4.

The player can move the tiles up, down, left, or right. Whenever two tiles with the same value collide during a move, they merge into one tile with double the value. For example, two 2 tiles become a 4, two 4 tiles become an 8, and two 16 tiles become a 32.

After each valid move, a new tile generally appears on an empty space. This creates a constant tension between progress and limited space. The player wants to combine tiles and create larger numbers, but every movement also changes the available space on the board.

The goal is to produce the 2048 tile. However, reaching 2048 is not necessarily the end of the game. Depending on the version being played, users may continue attempting to create larger tiles after reaching the target.

The game ends when there are no legal moves remaining. At that point, the board is full and no neighboring tiles can be combined.

This simple system creates surprisingly complex decisions. A move that appears beneficial in the short term may make the board much worse several turns later.