Tropical rainforest

Temperate Rainforest

A thick, moist jungle, buzzing with animal life and infested with disease. Despite its visual beauty, this is a very dangerous biome. Choking overgrowth, aggressive animals, and constant sickness are why some explorers call this the "green hell".

Base Stats

Type

Biome

Texture on World Map

Allows colonies

Yes

Allows Roads and Rivers

Yes

Animal Density

6.5

Plant Density

0.99

Disease MTB Days

35 days

Movement Difficulty

2^[Note]

Forageability

75%

Wild Plant Regrow Days

13 days

Min Temperature

15 °C (59 °F)

Max Temperature

N/A

Rainfall range

2000mm – 65535mm

Swampiness range

N/A

Max Fish Population

780

Weather Commonalities

Clear

18

Fog

1

Rain

2

Foggy rain

1

Dry Thunderstorm

0.3

Rainy Thunderstorm

1.7

Soft snow

4

Hard snow

4

Gray Pall

1

Blind fog

1

Overcast

2

Torrential rain

0.5

Tropical rainforest is a hot biome in RimWorld.

Summary

Tropical Rainforests are famous for having many diseases, including Sleeping sickness: a slow-progressing, long-lasting disease that is exclusive to the tropics. Many trees make it difficult to clear land and rapid plant growth makes it difficult to keep it clear.

In the lists below the number in brackets represents the relative commonality.

Flora

• Alocasia (0.8)
• Bamboo tree (0.3)
• Berry bush (0.05)
• Bush (0.15)
• Cecropia tree (0.3)
• Clivia (0.07)
• Giant rafflesia (0.0008)
• Grass (3)
• Low shrubs (2)
• Palm tree (0.3)
• Tall grass (2)
• Teak tree (0.2)
• Gray grass  (2)
• Rat palm tree  (0.3)
• Lily pad  (0.1)
• Lotus  (0.1)
• Reeds  (1.2)

Fauna

• Alpaca (0.5)
• Boomalope (0.5)
• Capybara (0.5)
• Cassowary (0.5)
• Chinchilla (0.5)
• Cobra (0.15)
• Elephant (0.5)
• Guinea pig (0.25)
• Monkey (1)
• Panther (0.15)
• Rat (1)
• Rhinoceros (0.5)
• Tortoise (0.5)
• Wild boar (0.5)
• Gorilla  (0.05)
• Macaw  (0.25)
• Panda  (0.05)
• Peafowl  (0.5)
• Tiger  (0.05)

Additionally, these animals can spawn in coastal maps:

• Hermit crab  (0.1)
• Sea turtle  (0.1)
• Seal  (0.1)
• Stone crab  (0.1)

If the map is polluted, then the game may choose to spawn in wild animals from this list instead:

• Boomalope (0.1)
• Boomrat (0.4)
• Raccoon (0.5)
• Rat (1)
• Warg (0.05)

Diseases

Tropical Rainforest has a disease MTB of 35 days. The following diseases can occur in a Tropical Rainforest:

Disease	Commonality
Flu	100
Plague	100
Malaria	160
Sleeping sickness	140
Gut worms	80
Fibrous mechanites	30
Sensory mechanites	30
Muscle parasites	80
Animal flu	100
Animal plague	100
Organ decay	10

Fish

The table below contains the list of all of the fish that can be caught - as well as where they can be caught.

Fish	Water body	Rarity
Tilapia	Freshwater	Common
Piranha	Freshwater	Uncommon
Bluefish	Saltwater	Common
Tuna	Saltwater	Uncommon
Flounder	Saltwater	Uncommon

Analysis

While food is rarely an issue, fertile land is common, and many tiles have comfortable temperatures year-round, the tropical forest is rife with disease and predation.

• Food and Growing: Easy - Growing seasons are often year-round, while it is densely populated with both animals and plant life.

• Disease: Difficult - Diseases are very common in the rainforest, with the only biomes having more diseases being the tropical swamp. In addition, wild healroot does not grow in the tropical rainforest, making medicine supply an issue unless there is a grower with Plants 8+.

• Temperature: Moderate (regular settings) or Extreme (hot world) - Cooler rainforest tiles should be fairly comfortable to live in except during heat waves. Warmer tiles can cause heatstroke during the warmer months, but passive coolers are easy to make due to the abundance of wood. If the world's temperature setting is increased past normal, tropical rainforests can have dangerously hot temperatures year-round. They have no significant cold periods, although cold snaps can happen in cooler tiles.

• Fires: Difficult - Tropical rainforests are filled with trees and other flora, making fires near your base difficult to contain. The game's firewatch will typically contain large fires, but various conditions can disable the firewatch and significant damage can occur before it contains the fire regardless. For more information, see Weather. Surrounding your base and growing fields with firebreaks such as stone walls, two-tile-wide non-flammable flooring, or sections of roof over soil to prevent plant growth will make fires less of an issue.

• Predators: Moderate, but common - While there are no large predators like grizzly bears, predators like cobras and panthers are common, and will sometimes decide to hunt colonists. Colonists who venture far away are at greater risk than usual, while small animals and children are especially vulnerable.

Overall difficulty is moderate. It is relatively easy in the early game due to having year-round growing periods and plenty of wood. Past the early game, when food and temperature are no longer issues, the rainforest is somewhat more difficult than most other biomes due to its disease frequency. The added diseases are annoying and will slow down production, and while rarely life-threatening, an outbreak can be a death sentence for a struggling or just-recovering colony.

Gallery

• 

  A Tropical Rainforest

• 

  Tropical Rainforest's texture on the world map

Version history

• 0.7.581 - Added

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Biomes

Temperate

Temperate forest • Temperate swamp • Scarlands

Hot

Tropical rainforest • Tropical swamp • Arid shrubland • Desert • Extreme desert • Glowforest • Grassland • Lava field

Cold

Boreal forest • Cold bog • Tundra • Ice sheet • Sea ice • Glacial plain • Orbit

Water

Lake • Ocean

Pocket map

Underground • Labyrinth • Metal hell • Undercave • Insect lair