Minecraft’s defiantly unrealistic style notwithstanding, players appreciate the game’s internal consistency and get frustrated at certain failures of verisimilitude. Chunk errors, for example, are squared-off seams in the world caused by glitches in the landscape-generation algorithm. Right out of the annals of reality is unrealistic comes Roraima Mountain, a pleasing reminder that you are living in a simulation and Notch is God. [Speculative Nonfiction. Thanks, Michael!]