Much of that success can be attributed to the game’s open structure and limitless potential. Players can build anything they imagine, provided its outward-facing geometry is made up of simple, colorful blocks. The focus on creativity is why so many players, young and old, have been drawn to the game and continue to play years after its release.

Source: ‘Minecraft’ tops 100 million sales

Apart from Tetris, few games have come anywhere close to hitting the 100 million mark.