Materials
Raw, refined, and advanced crafting inputs. Each tier gates a different band of blueprints.
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F
Wood
Passive harpooning (Day 1-30)
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F
Plastic
Passive harpooning (Day 1-30)
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D
Metal Scrap
Passive harpooning + Cargo Ship (mid-game)
-
D
Complex Scrap
Ocean debris + Cargo Ship salvage
-
F
Thatch
Passive harpooning (Day 1-15)
-
C
Iron Ore
Iron Vein Islands (terrestrial excavation)
-
B
Iron Ingot
Smelter (Iron Ore + Coal)
-
D
Clay
Island excavation (Iron Vein)
-
D
Sand
Island excavation
-
C
Bricks
Smelter (Clay + Sand)
-
C
Coal
Bonfire fuel / Cargo Ship salvage
-
S
Titanium
Late-game island excavation (Industrial Phase)
-
B
Biofuel
Biofuel Processor (food + wood composite)
-
A
Advanced Fuel
Cargo Ship + Kraken + Industrial crafting