← Overview

Core Keeper – Which Chest & Boss in Which Biome

Source: StreamingAssets/Conf (ID/ObjectID.json, ID/LootTableID.json, ID/Biome.json, Loot/*.json, Spawn/Initial/<Biome>). Object IDs green, Keys yellow, LootTableIDs blue, Boss/enemy IDs pink. ⚠ verify = boss→biome link not directly provable from Conf, confirm in‑game.

How a "boss chest" works: the boss is a normal enemy entity (its own ObjectID); on death it spawns a dedicated chest object (e.g. GlurchChest 171) whose contents are rolled from the boss's loot table (e.g. SlimeBoss 11). Chest object, boss entity and loot table are three separate IDs, all listed below.

1 · Dirt & Slime — Starting Area Biome None (0) / Slime (1)

Resources (mined)

Ore Boulders (Conf/Spawn/Initial/Slime) — spawn% per eligible tile (normal world): Copper Ore 0.3% (tier). → smelt to Copper Bar.

Other craft materials: Fiber + Scrap Part (break WoodenDestructible crates); Slime (slime blobs).

Enemy drops: Mushroom + Fungal Growth + Scrap Part (Mushroom Enemy). Mushroom Brute / slimes drop via ObjectInfo (not in Conf).

Chests

TypeChest (ObjectID)KeyLootTableIDNote
Tier / LockedLockedCopperChest 210 → CopperChest 211CopperKey 212CopperChest (280)Copper tier (Ore Boulder = Slime biome)
GenericInventoryChest 100Plain wooden chest, all biomes
World(world treasure)WorldChest (300) / WorldChestNature (301)Scattered surface/world chests

Boss / Miniboss

BossBoss IDBoss Chest (ObjectID)LootTableIDNote
Glurch the Abominous MassSlimeBoss 3020GlurchChest 171SlimeBoss (11)Starting-area boss (Slime puddle)
King SlimeKingSlimeChest 178Summoned event boss (SlimeBossSummoningItem 2503); ⚠ verify biome

Water

LiquidTilesetFishes LootTableIDFishing-junk LootTableID
WaterDirt 0DirtFishes (500)DirtFishingLoot (501)

2 · Clay Caves / Stone Biome Stone (3) — AreaLevel 30

Resources (mined)

Ore Boulders (Conf/Spawn/Initial/Stone) — spawn% per eligible tile (normal world): Iron Ore 0.3% (tier) · Copper Ore 0.1% · Gold Ore 0.1%. → smelt to Iron / Copper / Gold Bar.

Other craft materials: Fiber + Scrap Part + Mechanical Part (AncientDestructible); Wood + Fiber from Caveling foes (esp. CavelingBrute); Ancient Gemstone.

Enemy drops (Caveling / Caveling Brute / Caveling Shaman): Copper / Tin / Iron Ore, Wood, Fiber, Scrap Part, Mechanical Part, Ancient Gemstone, Caveling Bread, Ear Plate, Stone Caveling Moss. (RolyPoly drops via ObjectInfo.)

Chests

TypeChest (ObjectID)KeyLootTableIDNote
Tier / LockedLockedIronChest 213 → IronChest 214IronKey 215IronChest (281)Iron tier (Ore Boulder = Stone biome)
DungeonInventoryAncientChest 103Forgotten Ruins / Ancient structures

Boss / Miniboss

BossBoss IDBoss Chest (ObjectID)LootTableIDNote
Ghorm the DevourerGhormChest 172Circular-tunnel worm; ⚠ boss entity ID not in Conf, verify
Malugaz the CorruptedShamanBoss 3058MalugazChest 207ShamanBoss (65)Summoned (ShamanBossSummoningItem 2506), Forgotten Ruins

Water

LiquidTilesetFishes LootTableIDFishing-junk LootTableID
WaterStone 1 / Clay 11StoneFishes (504)StoneFishingLoot (505)

3 · Nature / Larva Hamlet Biome Nature (5) / Larva (2) — AreaLevel 40

Resources (mined)

Ore Boulders — spawn% per eligible tile (normal world):
Larva Hamlet (Conf/Spawn/Initial/Larva, biome 2): Tin Ore 0.3% (tier) · Copper Ore 0.1% · Gold Ore 0.1%.
Nature (Conf/Spawn/Initial/Nature, biome 5): Scarlet Ore 0.2% (tier) · Iron Ore 0.05% · Copper Ore 0.05% · Tin Ore 0.05% · Gold Ore 0.01%.

Other craft materials: Wood (chop GraveTree); Fiber + Scrap Part (NatureWoodenDestructible); Slime (poison slimes); Ancient Gemstone.

Enemy drops: Nature Caveling Moss + Ancient Gemstone + plant seeds (Caveling Gardener / Caveling Hunter); Slime (poison slimes, via ObjectInfo). Larva Hamlet: Larva Meat + Fiber + Clay Caveling Moss (Caveling Skirmisher / Caveling Spearman). Mold dungeon: InfectedCaveling (490) · MoldTentacle (515) (Conf enemy loot tables).

Chests

TypeChest (ObjectID)KeyLootTableIDNote
Tier / LockedLockedScarletChest 216 → ScarletChest 217ScarletKey 218ScarletChest (282)Scarlet tier (Ore Boulder = Nature biome)
DungeonInventoryLarvaHiveChest 101Larva Hive dungeon
DungeonInventoryMoldDungeonChest 102MoldDungeonChest (460)Mold dungeon

Boss / Miniboss

BossBoss IDBoss Chest (ObjectID)LootTableIDNote
The Hive MotherHiveBoss (LootTable 24)HivemotherChest 173HiveBoss (24)Summoned (HiveBossSummoningItem 2505); Halloween variant HivemotherHalloweenChest 180
Ivy the Poisonous MassPoisonSlimeBoss 3023IvyChest 174PoisonSlimeBoss (14)Poison-slime variant (spawns in Nature)

Water

LiquidTilesetFishes LootTableIDFishing-junk LootTableID
Water (Nature)Nature 8NatureFishes (506)NatureFishingLoot (507)
Water (Larva Hamlet)LarvaHive 6LarvaFishes (502)LarvaFishingLoot (503)
Water (Mold dungeon)Mold 9MoldFishes (508)MoldFishingLoot (509)

4 · The Great Wall Biome GreatWall (6)

BossBoss IDBoss Chest (ObjectID)LootTableIDNote
Wall BossWallBoss 3168WallBossChest 194WallBoss (705)Summoned (WallBossSummoningItem 2511); ⚠ verify boss name

Water: no fishable water in Conf for this area.

5 · Sunken Sea Biome Sea (7) — AreaLevel 60

Resources (mined)

Ore Boulders (Conf/Spawn/Initial/Sea) — spawn% per eligible tile (normal world): Octarine Ore 0.2% (tier, only ore here). → smelt to Octarine Bar.

Other craft materials: Coral Wood (Sea kelp / coral — the Sea-tier wood); Slime (slippery slimes); Sea Gemstone.

Enemy drops: Octarine Ore + Coral Wood + Crab Trophy (Crab); Slime (slippery slimes). Jellyfish / Turtle / Tentacle drop via ObjectInfo.

Chests

TypeChest (ObjectID)KeyLootTableIDNote
Tier / LockedLockedOctarineChest 219 → OctarineChest 220OctarineKey 221OctarineChest (283)Octarine tier (Ore Boulder = Sea biome)
BiomeInventorySeaBiomeChest 104SeaBiomeChest (512)Sunken Sea biome chest

Boss / Miniboss

BossBoss IDBoss Chest (ObjectID)LootTableIDNote
Omoroth the Sea TitanOctopusBoss 3110OctopusBossChest 177OctopusBoss (526)Sea Titan
Morpha the Aquatic MassSlipperySlimeBoss 3024MorphaChest 176SlipperySlimeBoss (15)Slippery-slime variant (spawns in Sea)
Atlantean WormAtlanteanWormBoss (LootTable 635)AtlantianWormChest 189AtlanteanWormBoss (635)Atlantis / deep Sea; ⚠ verify exact area

Water

LiquidTilesetFishes LootTableIDFishing-junk LootTableID
WaterSea 10SeaFishes (522)SeaFishingLoot (523)

6 · Desert of Beginnings Biome Desert (8) — AreaLevel 62

Resources (mined)

Ore Boulders (Conf/Spawn/Initial/Desert) — spawn% per eligible tile (normal world): Galaxite Ore 0.04% (tier) · Copper Ore 0.01% · Iron Ore 0.01% · Tin Ore 0.01% · Gold Ore 0.005%. → smelt to Galaxite / Copper / Iron / Tin / Gold Bar.

Other craft materials: Wood (chop PlumeTree); Scrap Part (DesertDestructible); Desert Gemstone.

Enemy drops: Galaxite Ore + Scrap Part + Blasting Dung (Bomb Scarab). Camel / Scarab Wingcover / RolyPoly drop via ObjectInfo.

Chests

TypeChest (ObjectID)KeyLootTableIDNote
Tier / LockedLockedGalaxiteChest 222 → GalaxiteChest 223GalaxiteKey 224GalaxiteChest (284)Galaxite tier (Ore Boulder = Desert biome)
Biome / DungeonInventoryDesertBiomeChest 105DesertDungeonChest (614) / OasisChest (289)Desert dungeon + Oasis sub-area

Boss / Miniboss

BossBoss IDBoss Chest (ObjectID)LootTableIDNote
Azeos the Sky TitanBirdBoss 3090BossChest 170 (generic)BirdBoss (70)No dedicated chest object found; ⚠ verify chest
Ra-Akar the Sand TitanScarabBoss 3131BossChest 170 (generic)ScarabBoss (607)Sand Titan (ScarabBossSpawnLocation 3132); ⚠ verify chest

Water

LiquidTilesetFishes LootTableIDFishing-junk LootTableID
Water (oasis)Oasis 66 / Sand 12DesertFishes (616)DesertFishingLoot (617)

7 · Forlorn City AreaLevel 61

TypeChest (ObjectID)KeyLootTableIDNote
Dungeon(City dungeon chest)CityDungeonChest (519)Forlorn City dungeon

Water: no fishable water in Conf for this area.

8 · Molten Quarry / Lava AreaLevel 63

Resources (mined / gathered)

No ore boulder in Conf (no Spawn/Initial folder for Lava). Craft materials come from breakables: Fiber + Scrap Part (LavaWoodenDestructible, loot table also drops Octarine/Galaxite Ore & Ancient Coin).

Enemy drops: Slime (lava slimes, via ObjectInfo). No Conf enemy loot tables for this area.

Chests

TypeChest (ObjectID)KeyLootTableIDNote
Biome / DungeonInventoryLavaChest 106LavaDungeonChest (615)Molten Quarry chest

Boss / Miniboss

BossBoss IDBoss Chest (ObjectID)LootTableIDNote
Igneous the Molten MassLavaSlimeBoss 3028LavaSlimeBossChest 179LavaSlimeBoss (609)Lava-slime Titan-tier boss

Water

LiquidTilesetFishes LootTableIDFishing-junk LootTableID
Lava (you fish in the lava lake)Lava 3LavaFishes (618)LavaFishingLoot (619)

9 · Crystal Caverns Biome Crystal (9) — AreaLevel 70

Resources (mined)

Crystal content is tile-gated under biome None (0) (Conf/Spawn/Initial/None) — spawn% per eligible tile (normal world): Solarite Ore 0.1% (tier) → smelt to Solarite Bar. Also present: Radiation Crystal node 4.5% (crystal deco/hazard).

Other craft materials: Gleam Wood (chop LucentOakTree — the crystal-tier wood); coloured gemstones Nature / Sea / Desert Gemstone + Ancient Gemstone (CrystalDestructible).

Enemy drops: Solarite Ore + all four Gemstones (Mimite); Solarite Ore + Meat (Crystal Big Snail); Ancient Coin (Infected Caveling); Mechanical Part + Scrap Part + Ancient Gemstone (Orbital Turret).

TypeChest (ObjectID)KeyLootTableIDNote
Tier / LockedLockedSolariteChest 225 → SolariteChest 226SolariteKey 227SolariteChest (285)Solarite tier (tile-gated, biome 0 + Crystal deco)

No dedicated Crystal-only boss chest in Conf. SlimeBossCrystal 2501 / HiveBossCrystal 2502 are Crystal-variant summoning items for the earlier bosses, not separate chests.

Water

LiquidTilesetFishes LootTableIDFishing-junk LootTableID
WaterCrystal 55CrystalFishes (636)CrystalFishingLoot (637)

10 · The Passage Biome Passage (10) — AreaLevel 80

Resources (mined)

Ore Boulders & crystal nodes (Conf/Spawn/Initial/Passage) — spawn% per eligible tile (normal world): Pandorium Ore Boulder 0.03% · Small Pandorium Crystal 2% · Pandorium Crystal 1% (tier) → Pandorium Bar. Also present: Sulfur (SulfurBud / SulfurTree).

Other craft materials: Wood (chop FeatherTree); Cytoplasm + Calcified Bone (PassageDestructible).

Enemy drops: AmoebaWorm (703) (Sulfur Worm) · AmoebaGiantWorm (704) (Colossal Amoeba); Cicada Nymph Trophy from Cicada Nymph; Passage flies drop via ObjectInfo. Craft materials here come from the destructibles above.

Chests

TypeChest (ObjectID)KeyLootTableIDNote
Tier (no lock)PassageChest 228PassageChest (287)Passage tier chest
DungeonGiantCicadaChest 208CicadaDungeonChest (288)Cicada dungeon chest

Boss / Miniboss

BossBoss IDBoss Chest (ObjectID)LootTableIDNote
The Giant CicadaGiantCicadaBoss 3183GiantCicadaChest 208GiantCicadaBoss (721)Summoned (GiantCicadaBossSummoningItem 2512)

Water

LiquidTilesetFishes LootTableIDFishing-junk LootTableID
WaterPassage 60PassageFishes (710)PassageFishingLoot (711)

11 · Great Excavation / Mechanical Biome Excavation (11) — AreaLevel 85

Resources (mined)

Ore Boulders (Conf/Spawn/Initial/Excavation) — spawn% per eligible tile (normal world): Relucite Ore 0.2% (tier, only ore here). → smelt to Relucite Bar.

Other craft materials: Wood (chop DeadTree); Scrap Part + Mechanical Part + Corrupted Alloy (ExcavationDestructible & broken robots).

Enemy drops (Robot Miner / Patroller / Swarmer, Void Cavelings, Void Larva): Relucite Ore, Corrupted Alloy, Mechanical Part, Relucite Key + robot/void trophies.

Chests

TypeChest (ObjectID)KeyLootTableIDNote
Tier / LockedLockedReluciteChest 950 → ReluciteChest 951ReluciteKey 952ReluciteChest (729)Relucite tier (Ore Boulder = Excavation biome)
BiomeInventoryExcavationBiomeChest 6869ReluciteChest (729)Great Excavation biome chest (same table as locked Relucite)

Boss / Miniboss

BossBoss IDBoss Chest (ObjectID)LootTableIDNote
Core CommanderCoreCommander (LootTable 646)CoreCommanderChest 193CoreCommander (646)Mechanical boss
Robot BossRobotBoss 3190RobotBossChest 229RobotBoss (734)Summoned (RobotBossSummoningItem 2515)

Water: no fishable water in Conf for this area.

12 · Alien Tech / Endgame

TypeChest (ObjectID)KeyLootTableIDNote
BiomeAlienChest 109AlienChest (286)Alien Tech area; ⚠ verify area

Water: no fishable water in Conf for this area.

13 · The Hydra Endgame — biome-variant boss

The Hydra appears as four biome-themed variants, each with its own chest and loot table.

VariantBoss IDBoss Chest (ObjectID)LootTableIDBait item
NatureHydraBossNature 3145HydraBossNatureChest 190HydraBossNature (643)Bait 153
SeaHydraBossSea 3146HydraBossSeaChest 191HydraBossSea (644)Bait 154
DesertHydraBossDesert 3147HydraBossDesertChest 192HydraBossDesert (645)Bait 155
VoidHydraBossVoid 3149HydraBossVoidChest 6876HydraBossVoid (735)Bait 156

Water / Liquid — How It Works

There is only one logical water type (TileType.water 126) plus wateredGround 50 and groundSlime 132. Every tile additionally stores a tileset field, and that selects the sprite/colour — so the same TileType.water looks different per biome (confirmed in DropLootSystem: top.tileType == TileType.water && top.tileset == 3, where tileset 3 = Lava → the lava lake). The actual sprites/colours live in the art asset bundles, not in readable Conf. What differs mechanically per biome is the fishing content — its own fish table (*Fishes) and junk/treasure table (*FishingLoot); both are listed under each biome's Water heading above. Areas without a Water heading (The Great Wall, Forlorn City, Excavation, Alien) have no fishable water in Conf.

Other / Seasonal / Uncategorised Chests

Chest (ObjectID)LootTableIDNote
BossChest 170Generic boss reward chest (Titans without a dedicated chest)
EerieChest 10107⚠ biome unknown, verify in-game
LockedPrinceChest 181 / LockedQueenChest 182 / LockedKingChest 183Royal chests (locked); Unlocked variants 184 / 185 / 186
GingerbreadChest 107 / ValentineChest 108 / EasterChest 175Seasonal event chests

Confirmed biome enum (ID/Biome.json): None(0) · Slime(1) · Larva(2) · Stone(3) · Obsidian(4) · Nature(5) · GreatWall(6) · Sea(7) · Desert(8) · Crystal(9) · Passage(10) · Excavation(11).

AreaLevel order: Stone(30) · Nature(40) · Sea(60) · City(61) · Desert(62) · Lava(63) · Crystal(70) · Passage(80) · Excavation(85) · Obsidian(100).

Resources (mined ore): the Resources line under each biome lists every ore boulder that spawns there with its per-tile spawn chance (normal world-gen), taken verbatim from spawnChance + biome in each *OreBoulder.json under Conf/Spawn/Initial/<Biome>. The highest-chance ore is the biome's tier ore; lower-chance ores are earlier-tier ores that carry over. Crystal Caverns content is tile-gated under biome None (0) (folder None). Biomes with no Spawn/Initial folder — Great Wall, Forlorn City, Lava, Alien, Obsidian — have no initial ore spawns in Conf.

Other craft materials (the second line under each biome): drops are taken verbatim from the Conf/Loot tables of the objects that spawn in that biome. Resolved item IDs: Wood 1610 · CoralWood 1612 · GleamWood 1613 · Fiber 1640 · ScrapPart 1648 · MechanicalPart 1647 · Cytoplasm 1649 · CalcifiedBone 1650 · CorruptedAlloy 1653 · Slime 1630 · Gemstones 1600–1603. Correction: Fiber does not come from grass — the Grass loot table (440) only yields seeds/nothing; Fiber drops from wooden destructibles (and many enemies). Wood is gathered by chopping the trees that spawn per biome (regular Wood on the surface, CoralWood in the Sunken Sea, GleamWood in the Crystal/Lucent area). Food plants are intentionally omitted.

Enemy drops (third line under each biome): from the per-enemy Conf/Loot tables of the enemies that spawn in that biome's Spawn/Initial folder. Only craft-relevant + signature drops are shown (most trophies omitted). Many simple enemies (RolyPoly, Dodo, Camel, Turtle, Jellyfish, all slimes) have no Conf loot table — they drop via baked ObjectInfo and are noted but not enumerated. Enemy names in pink.

All ObjectIDs, KeyIDs, LootTableIDs and the biome enum are taken verbatim from StreamingAssets/Conf. Tier-chest → biome links are confirmed via the Biome field of *OreBoulder.json in Conf/Spawn/Initial/<Biome>. Boss display names are confirmed wherever the chest object embeds the name (Glurch, Ghorm, Hivemother, Ivy, Morpha, KingSlime, Malugaz, AtlantianWorm); for the remaining bosses only the internal entity name is file-confirmed — entries marked ⚠ verify should be checked in-game.