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Metro 2039Tar Cascades
The Tar Cascades, in the area Unknown Worlds calls the Sparse Plains, are Subnautica 2's dark, tar-coated crossing about 700 m east of the Lifepod, 0 to 250 m deep, where the Collector Leviathan guards the way to the Axum ruins; cross low along the bottom in a Tadpole.
The Tar Cascades are Subnautica 2's dark, tar-coated crossing about 700 m east of the Lifepod, 0 to 250 m deep, and the territory of the Collector Leviathan: past the Tadpole Pens you must get through its trench to reach the Alien Ruins on Observatory Island, and Game Rant's advice is to stay low along the bottom in a Tadpole (May 21, 2026). All Things How groups the Tar Cascades as the Sparse Plains region (May 20, 2026). "Sparse Plains" is also Unknown Worlds' own name: 1.2 "Sealed off spot where players can get under the map near Sparse Plains" (Unknown Worlds, Aug 19, 2026). "Tar Cascades" is the guides' name.
Quick facts
| Depth | 0 to 250 m (All Things How, May 20, 2026) |
| Where | About 700 m east of the Lifepod, past the Graveyard and the Tadpole Pens |
| Name | Sparse Plains (Unknown Worlds); Tar Cascades (guides) |
| Look | Black, tar-like deposits on dark rock |
| Resources | Titanium, Copper, Quartz, Celestine, Dragon's Scale Coral (Beebom) |
| Danger | The Collector Leviathan |
| Leads to | Observatory Island and the Karakorum |
How do you get past the Collector Leviathan?
The Collector patrols the trench between the Tadpole Pens and the Alien Ruins. A Tadpole it grabs is destroyed with little effort, and a swimmer it grabs dies (Game Rant, May 21, 2026). What the launch guides recommend:
- Go by Tadpole, low: cross in the Tadpole, hugging the seafloor, rather than swimming or crossing near the surface (Game Rant; All Things How says the same for the whole trip east).
- Know where it is: Dexerto places the Collector in open water east of the hot zone at about 169 m; its split-body glow is visible from afar.
- Distract it: the Collector is "easily irritable" and can be distracted by other fauna or flares, Game Rant reported from its reveal (Game Rant, Sep 17, 2025). Small submersibles and habitats attract it.
- Go faster: PCGamesN says the Scout Ray chassis, a hydrofoil, helps cross the first chasm and escape the Leviathan (PCGamesN). See Tadpole Chassis.
IGN's May 16, 2026 Collector guide, on the launch build, measures the gap at about 500 m wide, several hundred meters east of the Lifepod, reached through a region of volcanic geysers.
In IGN's play the Tadpole survived being grabbed and damaged by the Collector at least twice, and the chassis upgrade let it move fast enough to slip the grasp altogether. That was before Hotfix 2 (Oct 6, 2026) "Improved Leviathan grab attack for Tadpole", so the Collector may hold on harder now.
Since launch its behavior has changed. 1.2 fixed it spinning 360 degrees when it grabs or throws a Tadpole, its shockwave in multiplayer, and the Camouflage Biomod making it let go of a captured player during the "eating scene" (Unknown Worlds). Buddy System Hotfix 1 (Sep 1, 2026) improved its pathing in the "lower canyon areas" and tightened its collision (Unknown Worlds), and Hotfix 2 (Oct 6, 2026) "Improved Leviathan grab attack for Tadpole" (Unknown Worlds). Scanning it unlocks the Sonic Echo Biomod (Game Rant). Unknown Worlds says Early Access 2 in December 2026 connects back to the Collector (Unknown Worlds, Oct 22, 2026).
Resources
All Things How lists Titanium, Copper, Quartz and Celestine, and Beebom adds Dragon's Scale Coral (May 19, 2026). Celestine, the light blue crystal that makes Strontium and the Modification Station, is the reason to stop. Game Rant's safer Celestine is on rock faces about 290 m south of the Alien Ruins waypoint, 250 m or deeper, "beyond" the Collector (May 15, 2026), so most players mine it after the crossing. See Resources.
Frequently asked questions
Where are the Tar Cascades in Subnautica 2? About 700 m east of the Lifepod, 0 to 250 m deep, by All Things How's launch-build reference; Unknown Worlds calls the area the Sparse Plains.
Where is the Collector Leviathan in Subnautica 2? In the trench about 700 m east, between the Tadpole Pens and the Alien Ruins; Dexerto also reports a second one in a Bloom area near the World Tree at about 350 m.
How do you cross to the Alien Ruins in Subnautica 2? In a Tadpole, staying low along the seafloor through the Collector Leviathan's trench, Game Rant advises; flares and other fauna can distract it.
Can the Collector Leviathan kill you in Subnautica 2? Yes. A swimmer it grabs dies, and it destroys a grabbed Tadpole with little effort; you reprint at your Biobed.
Sources
- Subnautica 2 Regions and Biomes Reference (Early Access), All Things How (Pallav Pathak), May 20, 2026
- All Subnautica 2 Biomes and Regions, Beebom (Bipradeep Biswas), May 19, 2026
- How to Locate and Escape the Collector Squid Leviathan in Subnautica 2, Game Rant (Christopher Norman Worcester), May 21, 2026
- Subnautica 2 - All Collector Leviathan locations, Dexerto, May 2026
- Subnautica 2 Reveals New Kind of Leviathan, Game Rant (Dominik Bošnjak), Sep 17, 2025
- How to build a Tadpole in Subnautica 2 and all upgrades, PCGamesN (Christian Vaz), May 18, 2026
- Every Biomod in Subnautica 2, Game Rant (Mehrdad Khayyat), May 20, 2026
- Celestine Location, Game Rant (William Parks), May 15, 2026
- Subnautica 2 Early Access 1.2 - Buddy System Update, Unknown Worlds, Aug 19, 2026
- Subnautica 2 Early Access Buddy System Hotfix 1, Unknown Worlds, Sep 1, 2026
- Subnautica 2 Early Access Buddy System Hotfix 2, Unknown Worlds, Oct 6, 2026
- Beyond the Surface - Voyage to Early Access 2, Unknown Worlds, Oct 22, 2026
- Subnautica 2 - Biome Maps and Secret Locations, IGN, May 19, 2026 (video)
- Subnautica 2: How to Find (and Survive) the Collector Leviathan, IGN, May 16, 2026 (video)
Moments
Subnautica 2 - Biome Maps and Secret Locations
IGN
Subnautica 2: How to Find (and Survive) the Collector Leviathan
IGN
Related
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Anemone HillsThe Anemone Hills are Subnautica 2's biome of towering pink-and-green anemones about 300 m northwest of the Lifepod, 0 to 151 m deep, where the infected Heat Tolerance Angel Comb waits behind Bloom you clear with the Sonic Resonator.
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Coral GardensCoral Gardens and North Coral Gardens are Unknown Worlds' names for Subnautica 2's early coral areas around the Lifepod; update 1.1 (Jul 8, 2026) put a second Biolab and more Silver there, and 1.2 gave North Coral Gardens its own music.
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Dolerite SpiresThe Dolerite Spires are a maze of jagged volcanic pillars in Subnautica 2's starting region, shallow to mid depth, with Lithium and Titanium, Quaker's Meetinghouse and two Spires wrecks that All Things How lists for the High Capacity Air Tank and the Rebreather on the launch build.
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Metal FarmsThe Axum Metal Farms are the far eastern edge of Subnautica 2's Early Access map, about 2,000 to 2,200 m east-northeast of the Lifepod beside the Karakorum Power Plant, the only source of Troilite and Atacamite and where you find the Axum Bacterial Culture to build a Metal Farm of your own.
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Necrolei HillsThe Necrolei Hills are Subnautica 2's infected hills about 300 m northwest of the Lifepod, the main source of Necrolei Cysts for Strong Acid, with Copper, Titanium, Deepwing Egg Clumps and fauna mutated by the Bloom.
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PlateausThe Plateaus are Subnautica 2's rocky biome about 300 m northeast of the Lifepod, 23 to 119 m deep by All Things How's count, with Camp One, the Old Habitat and the caves that hold the early Silver; the sandy Lead Zone lies nearby.
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Root CanyonRoot Canyon is Subnautica 2's deepest explorable biome, a pitch-black canyon 365 to 750 m deep in the far east, with root-like walls, the Control Room, Tech Sites, Blight Nodes, a Cold Zone, colonist Dive Elevators and the Axum Metal Farms; the Collector Leviathan patrols its lower reaches.
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ShallowsThe Shallows are Subnautica 2's starting biome, the bright coral reefs around the Lifepod, 3 to 224 m deep by All Things How's count, with the Welcome Center about 85 m southeast, the first Angel Comb, Quartz-filled Coral Domes and caves of Copper and Titanium below.
See also
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Collector LeviathanThe Collector Leviathan is Subnautica 2's giant squid, found in the trench about 700 m east of the Lifepod past the hot Graveyard waters; it cannot be killed, so you cross its trench low along the bottom in a Tadpole. Scanning it teaches the Sonic Echo Biomod.
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Observatory IslandObservatory Island is Subnautica 2's Axum tower rising out of the sea about 1,000 to 1,200 m east of the Lifepod, with the Alien Ruins (Unknown Worlds' Axum Ruins), the Rosetta Stone, a Biolab since 1.1 and the Axum Observatory, where the Early Access story stops.
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GraveyardThe Graveyard is Subnautica 2's hot, orange-watered biome, 0 to 266 m deep, that needs the Heat Tolerance Adaptation; it holds Gold, Salt, Sulfur and Lithium, the Tadpole Pens, Tailings Village, a Cicada Wreck, Nahema's Lab and hundreds of Water Slugs.
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Early Access 2Early Access 2 is Subnautica 2's next big content update, due in December 2026 with no day announced. Unknown Worlds promises a new region with several biomes, more of the colonists' and Axum story, new and returning creatures, a scarier Collector Leviathan, new Biomods and the Frog chassis for the Tadpole.