What is the 2048 game?

2048 is a single-player sliding tile puzzle game created by Italian web developer Gabriele Cirulli in March 2014. Played on a 4x4 grid, you slide numbered tiles in four directions. When two tiles with the same number collide, they merge into one tile with double the value. The objective is to create a tile with the value 2048, though you can continue playing beyond this goal. The game became a viral sensation due to its simple mechanics but deep strategy.