Minecraft wiki entry for 0x10c, associated text: I picked sizes that seemed to make for the most fun gameplay. In Alien, there was a lot of running around and pressing buttons while still feeling claustrophobic, but it's obviously a bit too large to be manned by a single person. I could see adventures on a nostromo size ship being fun in four player co-op play. – Reddit, u/xNotch, March 24, 2012