World generation

Worlds in RimWorld are generated from either random or user-provided seeds that allow for a completely new experience every time. Each world is uniquely filled with multiple biomes that change what the world looks like and how it behaves. For example, some biomes feature a large amount of mountains, while others are full of grasslands.

Worlds may be named by the player, are arranged in a grid of locations, and come in many different sizes:

150x112

200x150

250x188

300x225

350x262

400x300

Every square on a world is unique, with its own biome, elevation, average temperature, terrain, and rainfall amount. A colony can be built on one square. World size has no affect on game performance, as the world is simply used as a seed.

The following controls are used on the World generation menu:

Controls
LMB	Select location
RMB	Clear selection
MMB	Pan (click+hold)