Mod «Geological Landforms» for Rimworld (v1.3)

Geological Landforms

Adds 27 landforms to the game, which generate biome-independently.

The goal of this mod is to make map generation more interesting and varied, compared to the vanilla experience of simply potentially having either a cliff or a coast on one edge of your map.

Landforms of the selected world tile appear in the "special features" section of the world map terrain tab. Some landforms only generate on tiles within the right temperature range, rainfall amount and other conditions. There is also a button to search for a specific landform nearby.

Some of the landforms significantly affect gameplay and can make the game both easier or much more challenging in various ways. For example, Islands and Archipelagos are very remote but provide very little stone and ores, and Canyons and Rifts are very easy to defend and have plenty of ores, but provide very little natural resources like food, light, wood, and space to grow plants or keep animals.

The landforms are optimized for the standard map size (250x250). Using a larger map size should also be fine, but some of the landforms might not generate correctly if the map is too small.

This mod is currently in a beta state because the long-term gameplay effects of the landforms have not been tested and some things might need to be adjusted. If you encounter any issues or have suggestions, please leave a comment.

Landforms list:

  • Coast (has a variant that stretches along tow edges of the map)
  • Cove (has a variant with an island in the middle)
  • Peninsula
  • Landbridge
  • Tombolo
  • Coastal Island
  • Island
  • Atoll
  • Archipelago
  • Dry Lake
  • Lake (has a variant with a small island)
  • Cliff (has a variant that stretches along tow edges of the map)
  • Coast with Cliff
  • Cirque
  • Valley
  • Canyon
  • Lone Mountain
  • Caldera
  • Rift
  • Crater
  • Oasis
  • Ice Oasis
  • Swamp Hill


  • Map Reroll
  • Biomes! Islands
  • Alpha Biomes
  • [KV] Configurable Maps or Map Designer

Required mod: 

Added integration with "Biomes! Islands", allowing the plants and animals from the island biomes to spawn on any coastal landform. This feature is optional and disabled by default, you can enable it in the mod settings. Animal and plant spawning can be controlled separately.


  • Fixed some minor issues in map generation code
  • Fixed landforms not being able to spawn on world tiles with very high rainfall amount

Version 09.08.22 for Rimworld (v1.3)

  • Added Korean translation
  • Added slider in mod settings that controls animal amount in secluded areas (Islands, Fjord, Rift, etc.)
  • Fixed auto-cut plants filter not showing plants from secondary biomes


Version 30.06.22 for Rimworld (v1.3)

Version 22.06.22 for Rimworld (v1.3)

Version 30.05.22 for Rimworld (v1.3)

  • Fixes

Version 26.05.22 for Rimworld (v1.3)

Version 13.05.22 for Rimworld (v1.3)

Version 27.03.22 for Rimworld (v1.3)

  • Landforms no longer appear on impassable tiles, to make search less annoying.
  • New node-based landform editor which is more flexible and easier to work with than the old one
  • 3 new landforms added: Skerry, Badlands and Desert Plateau
  • Ore lump amounts now controlled by landform, adjusted based on amount of rock
  • New compatibility layer for MapReroll, previews should now be fully accurate
  • Integration with PrepareLanding, adds filtering by landform
  • Completely reworked map generator code, including more efficient and stable RNG engine
  • Many small stability and performance improvements

Version 07.03.22 for Rimworld (v1.3)

File info

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