The world of Waters of Ragnarök is procedurally generated from a single seed, using a collection of custom-designed biomes.

Currently, the world is divided into nine major regions, with each region further divided into nine smaller areas. Each biome defines the character of that part of the world: its islands, monsters, factions, loot, quests, weather, skybox, and other environmental features.

Source and More information: Procedural World Generation

Author: indieDB.com