The goal is to create a tile with the number 2048 by repeatedly merging tiles with the same value.
The game is played on a 4x4 grid that contains 16 cells; during play the board can hold up to 16 tiles at once.
At the start, two tiles with the number 2 or 4 appear on random empty cells of the grid.
On each turn you move all tiles in one of four directions: up, down, left or right; all tiles slide as far as possible in the chosen direction until they hit the edge or another tile.
When two tiles with the same number collide during a move, they merge into a single tile whose value equals the sum of both original tiles, such as 2+2=4 or 4+4=8.
Each tile can merge only once per move, so after merging it will not combine again until the next turn.
After every move, once all slides and merges are completed, a new tile with the number 2 or 4 appears on a random empty cell.
You win when you successfully create a tile with the number 2048 on the board.
You lose when the grid is completely full and there are no valid moves left, meaning no adjacent tiles with the same value can be merged in any direction.