Inventory & Sack Guide — 100 Days At Sea

How Inventory Works

Your sack holds gathered resources, weapons, consumables, and quest items during island runs. Raft storage (Container Shelter and bench proximity) holds bulk materials between sails.

Collect: press F or E on valid prompts — harpoon catches, island nodes, chest loot, and floating debris all enter your sack in pickup order.

Store on raft: interact with storage or bench zones with E when the store prompt appears — frees sack space for the next island loop.

Death without Container Shelter protection can drop carried items — prioritize shelter before long Ice Island or Kraken Zone sails per raft building.

How to Drop Items

When your sack is full, the game blocks new pickups until you free a slot. Drop the most recently collected item using the dedicated drop key — on PC this is typically Backspace or the key shown in the on-screen prompt during overflow.

Mobile: tap and hold the item in your inventory bag, then select Drop from the context menu. Console: open inventory with Y/Triangle, highlight the item, use the drop button mapped in Roblox settings.

Drop strategically before opening Purple chests on shipwreck island — discard low-value Wood bundles or duplicate Scrap Metal, not Gunpowder or Iron you need for armor.

Never drop Transponder, Stronghold keys, or event items from alien invasion event — these do not respawn if discarded during a run.

Sack Upgrades — Old Sack, Good Sack, Giant Sack

Old Sack (6 Wood + 4 Rope): early storage expansion craftable at the raft bench — see Extended Tools on crafting. Craft before your first Fisherman Island trip.

Good Sack: starter tool on the Star class (70 Pearls) — +10% health and expanded carry capacity for mid-game island loops.

Giant Sack: starter tool on the Triple Star class (250 Pearls) — 15% increased health and less hunger with the largest default sack slot count.

Pearl spend trade-off: a sack class accelerates Iron and Obsidian hauls, but Medic or Survivor may save more lives on first runs. Compare on tier list before spending 100DAYS Pearls from codes.

Island Loot Triage

Starter Island: keep Wood, Stone, and Coconuts — drop decorative junk if sack fills during day-one gathering.

Shipwreck Island: Iron and Gunpowder are non-negotiable — drop excess Wood after Sawmill is online on the raft. See shipwreck island.

Ghost Galleon runs: reserve two sack slots for blueprint drops and legendary chest scraps — full walkthrough on ghost galleon.

Fisherman Island trades: spare food in your sack doubles as currency for buildings and weapons from the Fisherman NPC — stock meals before selling gear per fisherman island.

Ice Island: warm cooked meals take sack slots but prevent cold drain — do not drop them for Ice Crystals mid-fight on ice island.

Ghost Pirate Corpses and Crafting Machine

Ghost Pirates spawn on raid nights — melee and gunner variants. Kill them, then pick up their corpses instead of leaving bodies on the raft deck.

Feed corpses into the crafting machine to produce Green Gum — a green substance used in select mid-game recipes per Pro Game Guides and AllThingsHow.

Corpses occupy temporary sack space — drop low-priority mats immediately after processing to keep room for the next raid wave.

Pair corpse collection with night survival raft defenses so you survive long enough to loot every body.