After what feels like an eternity in alpha, open-world zombie survival craft-’em’-up 7 Days to Die has hit its full release. While getting into a server is a bit of a struggle at the moment, once you create a game, your first choice will be an essential one.

Choosing a 7 Days to Die map to play on can mean the difference between life and death. Biomes, enemies, and essential resources are all distributed differently depending on your choice of map, meaning that knowing your terrain is essential—and this is the precise advantage that the game’s so-called “pregen maps” offer.