Have you heard of Minecraft? If you have a gamer in the house, you may be familiar with it, as it’s one of the most popular games of all time, having sold more than 20 million copies. Considering how simple the concept is, and compared to some of the stunningly realistic visuals of many modern games, this humble 8-bit building game might seem like an unlikely best-seller. But in fact, gamers of all ages have been engrossed by it. The concept is simple: players build with 3D cubes (a bit like virtual LEGOs) in an infinite “sandbox” game world, with no specific goals or levels to beat.

Players simply explore, find natural resources, build, and craft tools. In survival mode, players need to make sure they find food and other necessities, while protecting themselves from monsters. But in creative mode, the sky is the limit, with endless resources and health, no enemies, and the ability to fly freely around the game world.