Minecraft wiki entry for Building_a_metropolis, associated text: Militaristic: Make a huge city surrounded by a wall made out of a highly resistant block (bedrock, obsidian, etc.). Try and make the city as scary-looking as possible, with armor and weapon factories, lots of smog, and some lava. Also add TNT cannons facing outward beyond the wall, dispensers filled with poison or harming tipped arrows facing out, and armed guards patrolling everywhere. You could also add Iron Golems for some added protection help. If you're playing on a server, constantly attack and overtake other cities, villages, or fortresses. Loot them, and then leave them ruined.