The Rarity & Obscurity System: From Plankton to Hadal
Understanding the 4 rarity tiers is the single most important skill in Krillion. Learn how the game differentiates surface answers from deep abyssal knowledge across all 104+ categories.
1. Plankton Tier (Common / Mainstream)
Plankton tier answers represent the first 5-10 words that 90% of the population recall when presented with a prompt.
While valid and safe, they provide minimal buoyancy reduction, granting only +220m of base depth.
- Periodic Table: Gold, Silver, Iron, Oxygen, Carbon, Hydrogen.
- World Capitals: Paris, London, Tokyo, Washington D.C., Rome, Beijing.
- Marine Life: Shark, Dolphin, Whale, Octopus, Clownfish.
- Dinosaur: T-Rex, Triceratops, Velociraptor, Stegosaurus.
2. Reef Tier (Uncommon / Intermediate)
Reef tier answers represent respectable, secondary knowledge. They are words known to educated individuals but not immediately top-of-mind.
Awards +600m base depth and unlocks the Mesopelagic twilight zone.
- Periodic Table: Titanium, Bismuth, Argon, Cobalt, Tungsten.
- World Capitals: Helsinki, Canberra, Lisbon, Ottawa, Ankara.
- Marine Life: Manta Ray, Nautilus, Narwhal, Giant Isopod, Moray Eel.
- Dinosaur: Ankylosaurus, Allosaurus, Parasaurolophus, Carnotaurus.
3. Abyssal Tier (Rare / Specialized)
Abyssal tier answers require genuine domain enthusiasm or specialized interest. These answers rarely appear in everyday conversations.
Awards +1,400m base depth, illuminating the pitch-black Bathypelagic Midnight zone.
- Periodic Table: Krypton, Xenon, Lithium, Platinum, Selenium.
- World Capitals: Wellington, Brasilia, Riyadh, Gaborone, Mbabane.
- Marine Life: Vampire Squid, Anglerfish, Dumbo Octopus, Sarcastic Fringehead.
- Dinosaur: Archaeopteryx, Pachycephalosaurus, Megalosaurus, Iguanodon.
4. Hadal Tier (Deep Cut / Legendary)
Hadal tier answers represent the deepest cuts of human encyclopedic memory. These entities belong to specialized academic papers, rare geographic microstates, synthetic isotopes, or obscure mythology.
Awards +2,200m base depth and triggers the Hadal emerald sonar surge.
- Periodic Table: Oganesson, Dysprosium, Thulium, Praseodymium, Tennessine, Lutetium.
- World Capitals: Ngerulmud (Palau), Naypyidaw (Myanmar), Ouagadougou (Burkina Faso), Funafuti (Tuvalu).
- Marine Life: Xenophyophore, Barreleye Fish, Hadal Snailfish, Leafy Seadragon, Yeti Crab.
- Dinosaur: Therizinosaurus, Deinocheirus, Amargasaurus, Dreadnoughtus, Yutyrannus.
Test These Mechanics in Live Action
Launch an expedition right now. Pick rare answers, manage your speed bonuses, and see if you can penetrate the Hadal Trench.
Start Live Game Dive