Biomes
Biomes are the ten regions of Primal Idle, played in a fixed order. Each biome is the setting for its expedition patrol, its cave delve, and its dig site, and each is home to its own creatures and a single Guardian boss. Progression is a chain: a biome unlocks only once you have defeated the Guardian of the biome before it.
How biomes gate content
[edit | edit source]Every biome acts as a gate on several systems at once:
- Expedition patrol — a repeatable run that yields that biome's relic (and sometimes basic materials). See Expeditions.
- Guardian boss — a tougher challenge run. Defeating it advances your progress and unlocks the next biome in the chain.
- Cave — one Delving cave per biome, which opens once the biome is fully cleared.
- Dig site — one Excavation site per biome, started with that biome's Dig Site Map.
- Creatures — a roster of wild species that appear on the biome's Trail and can be tamed.
The very first biome, the Grasslands, is available from the start. Every other biome requires the previous biome's Guardian to be defeated.
Biome progression
[edit | edit source]The biomes below are listed in progression order.
| # | Biome | Unlocks after defeating | Guardian boss | Patrol relic | Cave | Dig site |
|---|---|---|---|---|---|---|
| 1 | Grasslands | — (available from start) | Thunderfoot Matriarch | Verdant Relic | Sunlit Grotto | Sunken Barrow |
| 2 | Redwood Wilds | Thunderfoot Matriarch (Grasslands) | Old Growth Tyrant | Redwood Relic | Rootway Hollow | Rootbound Boneyard |
| 3 | Murkwater Swamp | Old Growth Tyrant (Redwood Wilds) | Murk Sovereign | Murk Relic | Drowned Cavern | Peatlock Trench |
| 4 | Cavern Depths | Murk Sovereign (Murkwater Swamp) | Hollow King | Cavern Relic | Echoing Deep | Echoing Ossuary |
| 5 | Scorched Badlands | Hollow King (Cavern Depths) | Scorched King | Badlands Relic | Cinder Vault | Scorched Wash |
| 6 | Coral Shallows | Scorched King (Scorched Badlands) | Tide Leviathan | Coral Relic | Tidewrack Cave | Reefbed Shelf |
| 7 | Frozen Wastes | Tide Leviathan (Coral Shallows) | Frostmaw | Frozen Relic | Glacier Hollow | Permafrost Cut |
| 8 | Ashen Peaks | Frostmaw (Frozen Wastes) | Ash Tyrant | Ashen Relic | Ashen Gallery | Cinder Terraces |
| 9 | Skyreach Plateau | Ash Tyrant (Ashen Peaks) | Sky Sovereign | Skyreach Relic | Skyvein Chasm | Skyfall Scree |
| 10 | the Sundered Vale | Sky Sovereign (Skyreach Plateau) | The Sundered One | Vale Relic | Vale Abyss | The Shattered Bed |
Creatures by biome
[edit | edit source]Each biome fields its own roster of wild species, encountered on the Trail during expeditions and available for Taming.
| Biome | Wild creatures |
|---|---|
| Grasslands | Terror Bird, Raptor, Gastornis, Triceratops |
| Redwood Wilds | Megaloceros, Dire Wolf, Stegosaurus, Allosaurus |
| Murkwater Swamp | Dimetrodon, Baryonyx, Kaprosuchus, Sarcosuchus |
| Cavern Depths | Giant Bat, Forge Salamander, Doedicurus, Cave Bear |
| Scorched Badlands | Moros, Ankylosaurus, Carnotaurus |
| Coral Shallows | Archelon, Plesiosaurus, Dunkleosteus |
| Frozen Wastes | Elasmotherium, Woolly Rhino, Smilodon, Woolly Mammoth |
| Ashen Peaks | Ceratosaurus, Spinosaurus, Tyrannosaurus |
| Skyreach Plateau | Pteranodon, Argentavis, Hatzegopteryx |
| the Sundered Vale | Titanoboa, Therizinosaurus, Quetzalcoatlus, Giganotosaurus |
Biome flavor
[edit | edit source]| Biome | Description |
|---|---|
| Grasslands | Rolling plains where every survivor takes their first steps. |
| Redwood Wilds | Towering forest where the canopy swallows the sun. |
| Murkwater Swamp | Black water, singing insects, and things that watch from below. |
| Cavern Depths | Glowcap-lit tunnels that wind far beneath the world. |
| Scorched Badlands | Cracked red earth where only the hardest things survive noon. |
| Coral Shallows | A warm turquoise reef hiding leviathans past the drop-off. |
| Frozen Wastes | A white expanse where only the woolly and the wise survive. |
| Ashen Peaks | Smoking slopes of obsidian and cinder, ruled by the Ash Tyrant. |
| Skyreach Plateau | A tabletop above the clouds where giants ride the thermals. |
| the Sundered Vale | A shattered valley humming with primal energy. The end — or the beginning. |