Submitted by fernando_favela t3_z7w1ry in explainlikeimfive
For example : you can play Minecraft on a device that fits in your hands and you don't even need to have wifi connection to run it, it is a game that can create quadrillions of unique worlds larger than the earth's surface.
Ill_Solution5552 t1_iy8d3bu wrote
It is not downloaded. It is generated locally by your computer.
The worlds are generated in chuncks. And the chunks are based on a random seed. The same random seed will generate the same world every time.