Although the blocky, two dimensional mazes from entombed might look simple by the standards of today’s computer graphics, in 1982 you couldn’t just design a set of mazes, store them in the game and later display them on-screen – there wasn’t enough memory on the game cartridges for something like that. In many cases, mazes were generated “procedurally” – in other words, the game created them randomly on the fly, so players never actually traversed the same maze twice.