'Minecraft' tops 100 million sales

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. Mojang has supported the game with a steady stream of updates that have added new mechanics, creatures and materials. The game's flexibility has also made it a smash-hit in the classroom, teaching art, geology, coding and other subjects.