Valheim DatabaseValheim 1.0.17 · read from the game files · unofficial

32 variants · Valheim 1.0.17

Biome variants

Since 1.0 the world generator gives some stretches of a biome a modifier. 20 of the 32 add creatures of their own, 8 raise the chance of stars (up to ×3), the rest add plants and rocks. A world gets a set number of stretches of each, none closer than 500 m to the world centre. The game shows no name for them: the names below are the files' own, and in game a variant still reads as its biome.

Variants
32
in 7 biomes
Own creatures
20
variants with a spawn list
More stars
8
up to ×3 the chance
Nearest
500 m
from the world centre

Every variant

Dandelion Meadows

Meadows

1–3 stretches per world · 20% chance per stretch once the minimum is placed · at least 500 m from the centre

Plants and rocks it adds

Dark Meadows

Meadows

2–5 stretches per world · 50% chance per stretch once the minimum is placed · at least 1,900 m from the centre

Stars ×2: a creature that can reach 2★ gets it 1 in 25 (elsewhere 1 in 100)

Creatures it adds

  • Draugrday and night · groups of 1–2 · up to 2★ · max 2 at once
  • Draugr Eliteat night · groups of 1 · no stars · max 1 at once

Menhir

MeadowsPlains

1–3 stretches per world · 20% chance per stretch once the minimum is placed · at least 750 m from the centre

Creatures it adds

  • Skeletonat night · groups of 1–3 · no stars · max 3 at once · after Bonemass

Plants and rocks it adds

Mushroom

MeadowsBlack Forest

1–3 stretches per world · 20% chance per stretch once the minimum is placed · at least 500 m from the centre

Plants and rocks it adds

Peaceful Meadows

Meadows

1–2 stretches per world · 20% chance per stretch once the minimum is placed · at least 1,000 m from the centre

Creatures it adds

  • Boarday and night · groups of 4–7 · up to 2★ · max 15 at once
  • Deerday and night · groups of 2–4 · up to 2★ · max 10 at once

Plants and rocks it adds

  • Fire flies

Raspberry Meadows

Meadows

1–3 stretches per world · 20% chance per stretch once the minimum is placed · at least 500 m from the centre

Plants and rocks it adds

Smalltree Meadows

Meadows

1–3 stretches per world · 20% chance per stretch once the minimum is placed · at least 500 m from the centre

Creatures it adds

  • Neckday and night · groups of 2–4 · up to 2★ · max 6 at once
  • Neckday and night · groups of 2–4 · up to 2★ · max 8 at once

Plants and rocks it adds

Blueberry Black Forest

Black Forest

1–5 stretches per world · 20% chance per stretch once the minimum is placed · at least 500 m from the centre

Plants and rocks it adds

Kalhygge Black Forest

Black Forest

1–2 stretches per world · 20% chance per stretch once the minimum is placed · at least 500 m from the centre

Plants and rocks it adds

Pinetree Black Forest

Black Forest

1–5 stretches per world · 20% chance per stretch once the minimum is placed · at least 750 m from the centre

Stars ×2: a creature that can reach 2★ gets it 1 in 25 (elsewhere 1 in 100)

Plants and rocks it adds

Rock Black Forest

Black Forest

1–5 stretches per world · 20% chance per stretch once the minimum is placed · at least 750 m from the centre

Stars ×2: a creature that can reach 2★ gets it 1 in 25 (elsewhere 1 in 100)

Plants and rocks it adds

Root Black Forest

Black Forest

1–4 stretches per world · 20% chance per stretch once the minimum is placed · at least 2,000 m from the centre

Creatures it adds

  • Rootday and night · groups of 1–3 · up to 2★ · max 150 at once
  • Greydwarf Bruteat night · groups of 1 · up to 2★ · max 3 at once

Plants and rocks it adds

Ruin Black Forest

Black Forest

1–5 stretches per world · 20% chance per stretch once the minimum is placed · at least 500 m from the centre

Plants and rocks it adds

  • Ghost skull
  • Stone wall x ruin
  • Stone wall ruin

Troll Black Forest

Black Forest

1–3 stretches per world · 20% chance per stretch once the minimum is placed · at least 750 m from the centre

Creatures it adds

  • Trollday and night · groups of 1 · up to 2★ · max 2 at once

Abomination Swamp

Swamp

1–3 stretches per world · 20% chance per stretch once the minimum is placed · at least 2,000 m from the centre

Creatures it adds

  • Abominationday and night · groups of 1 · no stars · max 3 at once

Bat Swamp

Swamp

1–3 stretches per world · 20% chance per stretch once the minimum is placed · at least 2,000 m from the centre

Creatures it adds

  • Batday and night · groups of 2–3 · no stars · max 10 at once

Bog Swamp

Swamp

1–5 stretches per world · 20% chance per stretch once the minimum is placed · at least 1,500 m from the centre

Creatures it adds

  • Abominationday and night · groups of 1 · no stars · max 3 at once

Plants and rocks it adds

Bones

SwampPlainsMistlands

1–3 stretches per world · 20% chance per stretch once the minimum is placed · at least 2,000 m from the centre

Creatures it adds

  • Rancid Remainsday and night · groups of 1–3 · up to 2★ · max 3 at once

Plants and rocks it adds

Hut Swamp

Swamp

1–3 stretches per world · 20% chance per stretch once the minimum is placed · at least 1,500 m from the centre

Creatures it adds

  • Wraithat night · groups of 1 · no stars · max 3 at once

Plants and rocks it adds

Drake Mountain

Mountains

1–3 stretches per world · 20% chance per stretch once the minimum is placed · at least 2,000 m from the centre

Stars ×2: a creature that can reach 2★ gets it 1 in 25 (elsewhere 1 in 100)

Creatures it adds

  • Drakeday and night · groups of 1–2 · no stars · max 4 at once

Plants and rocks it adds

Fortress Mountain

Mountains

1–2 stretches per world · 20% chance per stretch once the minimum is placed · at least 2,000 m from the centre

Stars ×3: a creature that can reach 2★ gets it 1 in 11 (elsewhere 1 in 100)

Creatures it adds

  • Skeletonday and night · groups of 3–6 · no stars · max 10 at once
  • Stone Golemday and night · groups of 1–2 · no stars · max 1 at once

Plants and rocks it adds

  • Rock mountaingivesStone
  • Stone wall ruin

Wolf Mountain

Mountains

1–5 stretches per world · 20% chance per stretch once the minimum is placed · at least 2,000 m from the centre

Stars ×2: a creature that can reach 2★ gets it 1 in 25 (elsewhere 1 in 100)

Creatures it adds

  • Wolfday and night · groups of 2–4 · up to 2★ · max 8 at once

Plants and rocks it adds

Death Plains

Plains

0–1 stretch per world · 20% chance per stretch once the minimum is placed · at least 1,000 m from the centre

Stars ×2: a creature that can reach 2★ gets it 1 in 25 (elsewhere 1 in 100)

Creatures it adds

  • Deathsquitoday and night · groups of 1–3 · no stars · max 5 at once

Goblin Plains

Plains

0–2 stretches per world · 20% chance per stretch once the minimum is placed · at least 2,000 m from the centre

Stars ×2: a creature that can reach 2★ gets it 1 in 25 (elsewhere 1 in 100)

Creatures it adds

  • Fulingday and night · groups of 5–7 · up to 2★ · max 5 at once

Lox Plains

Plains

0–1 stretch per world · 20% chance per stretch once the minimum is placed · at least 2,000 m from the centre

Creatures it adds

  • Loxday and night · groups of 3–5 · no stars · max 15 at once

BroodSwarm Mistlands

Mistlands

1–3 stretches per world · 20% chance per stretch once the minimum is placed · at least 2,000 m from the centre

Creatures it adds

  • Seeker Broodat night · groups of 5–10 · no stars · max 100 at once

Hare Mistlands

Mistlands

1–3 stretches per world · 20% chance per stretch once the minimum is placed · at least 2,000 m from the centre

Creatures it adds

  • Hareday and night · groups of 1–3 · up to 2★ · max 20 at once

Rockless Mistlands

Mistlands

2–5 stretches per world · 20% chance per stretch once the minimum is placed · at least 2,000 m from the centre

Plants and rocks it adds

Trees Mistlands

Mistlands

1–5 stretches per world · 20% chance per stretch once the minimum is placed · at least 2,000 m from the centre

Plants and rocks it adds

Formula

Placing: for each biome the generator shuffles its stretches (BiomeSector) with the world seed. A variant goes on a stretch while it has fewer than its maximum — always until it reaches its minimum, after that with its chance — and only where the stretch is far enough from the centre (and of a size, height and neighbourhood the variant accepts).

In a stretch with a variant, the spawn system also runs the variant's own spawn list, the vegetation pass places the variant's plants and rocks only there, and the chance of a level-up (a star) is multiplied by the variant's multiplier: 10% per level × multiplier.

assembly_valheim (Valheim 1.0.17): AltBiomeWorldData.GenerateAltBiomes, BiomeSector.CanAddModifier, SpawnSystem.UpdateSpawnList, ZoneSystem vegetation placement, SpawnSystem.GetLevelUpChance. Variants: AltBiomeList in the game files.

Questions

›How many biome variants are there in Valheim?

32 in 1.0.17, across 7 biomes: Meadows 9, Black Forest 9, Swamp 6, Mountains 4, Plains 6, Mistlands 7, Deep North 1.

›Which biome variants spawn extra creatures?

Birch Meadows: Deer; Dark Meadows: Draugr, Draugr Elite; Menhir: Skeleton; Peaceful Meadows: Boar, Deer; Smalltree Meadows: Neck; Root Black Forest: Root, Greydwarf Brute; Troll Black Forest: Troll; Abomination Swamp: Abomination; Bat Swamp: Bat; Bog Swamp: Abomination; Bones: Rancid Remains; Hut Swamp: Wraith; Drake Mountain: Drake; Fortress Mountain: Skeleton, Stone Golem; Wolf Mountain: Wolf; Death Plains: Deathsquito; Goblin Plains: Fuling; Lox Plains: Lox; BroodSwarm Mistlands: Seeker Brood; Hare Mistlands: Hare.

›Do biome variants have more star creatures?

8 do: Dark Meadows ×2, Pinetree Black Forest ×2, Rock Black Forest ×2, Drake Mountain ×2, Fortress Mountain ×3, Wolf Mountain ×2, Death Plains ×2, Goblin Plains ×2. A creature that can reach 2 stars gets them 1 in 100 normally and 1 in 11 at ×3.

More on stars: star chances. Biome by biome: all biomes.