ReefPacks

The Reef's backpacks. Six packs, one per biome, worn in the cape slot; each one is a real inventory that travels with the item: drop it, die with it, put it in a chest, it keeps what is inside.

Install on the server and on every client. The server refuses a client that does not run the same version (Jötunn network compatibility). Players on The Reef get it through the TheReef modpack.

What it does

• Satchel (Meadows), Rugged Backpack (Black Forest), Bloodbag Wetpack (Swamp), Arctic Sherpa Pack (Mountains), Lox Hide Knappsack (Plains), Explorers Wisppack (Mistlands). Same recipes and upgrade costs as before; the grid grows with the pack's level.
• Open it: inventory open, press I (changeable in reef.packs.cfg). Press again to close. Option: open the pack every time the inventory opens.
• Weight: what is inside weighs 30 % of its real weight (server setting).
• Carry bonus while the pack is worn (+5 to +30 depending on the pack, server setting).
• Portals: a portal refuses you when a pack holds something that portal refuses, exactly like your main inventory. With AdvancedPortals the pack follows the portal tier.
• Crafting stations see what is in the worn pack (with AzuCraftyBoxes on the server).
• A pack cannot go inside a pack.

Coming from AdventureBackpacks

Nothing to do. The packs you already own keep their look, their level and their contents: the item names and the save format are the same. Remove AdventureBackpacks (and its Vapok library) from the profile; the two refuse to load together.

Not carried over yet: the biome effects (feather fall, demister, frost/cold, troll armour), the speed malus, the quick-drop key, the creature drops, the legacy iron/silver packs.

Config (BepInEx/config/reef.packs.cfg)

• [Packs] Weight multiplier — server, synced.
• [Backpack: <name>] Backpack Size - Level 1..4, Carry Bonus — server, synced.
• [Keys] Open pack, Open with inventory — yours.

Credits and licence

Code: The Reef (Synistro), MIT.

Models, textures and icons of the six packs come from AdventureBackpacks by Vapok (Pete Navarra), used under the MIT licence:

MIT License — Copyright (c) 2023 Pete Navarra (aka Vapok)

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND.

Full text in LICENSE.md.

Problems

Tell Synistro on Discord with your mod manager's log (Settings > Browse profile folder > BepInEx/LogOutput.log).

Changelog

0.1.1 — 2026-09-11

• Rigged packs (Rugged Backpack and the others built on skinned meshes) now sit on the wearer's back: their bones are re-bound to the player skeleton when the shoulder slot is equipped, as AdventureBackpacks did. Client visual only; saves and network unchanged (0.1.0 clients and servers stay compatible).
• Weight: the 30 % applies to the heavy stuff only — contents whose unit weight is at least the new Weight threshold (2 by default: wood, stone, flint, ores, bars); food, resin, feathers and the like keep their real weight. Threshold 0 = the 0.1.0 behaviour.
• At most 3 packs per player (Max packs carried, worn one included): picking up, taking from a chest and crafting a fourth are refused with a message; nothing is destroyed, a pack already carried stays until put down. 0 = no limit.

0.1.0 — 2026-09-11

• First build. Six biome packs (same items, recipes, grids and save format as AdventureBackpacks 1.9.13, so existing packs keep their contents), open with I in the inventory, contents at 30 % weight, portal rule, carry bonus, crafting from the worn pack. Valheim 1.0.7, Jötunn 2.30.0.
• Proven on the bench 2026-09-10 (restart 70): existing packs kept their contents, open/close/relog, craft from the pack, portals, weight, tombstone; 0 exceptions server and client.