Firewalker

Author: YouDied
Version: 1.0.0
Discord: https://discord.gg/z3vzqtFsa3

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What it does

Firewalker lets you walk on lava and through fires (campfires, bonfires, burning ground) without taking environmental fire damage.

The catch: enemy fire attacks still hurt you as normal.
A Draugr Fyre's fireball, a Surtling's melee, a Gjall's firebomb — all of that still burns.

Fire Resistance Mead

The vanilla Fire Resistance Mead reduces fire damage from enemies.
Firewalker leaves that interaction alone — the mead still does what it always did for enemy fire.

Situation	Without Mead	With Mead
Walk on lava	✅ No damage	✅ No damage
Stand in campfire	✅ No damage	✅ No damage
Hit by enemy fire attack	🔥 Full damage	🛡️ Reduced (vanilla mead)
Burning status from enemy	🔥 Applied	🛡️ Reduced (vanilla mead)

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Installation

1. Install BepInEx for Valheim.
2. Drop Firewalker.dll into BepInEx/plugins/Firewalker/.
3. Launch the game.

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Configuration

After first launch, a config file is created at:

BepInEx/config/YouDied.Firewalker.cfg

Key	Default	Description
Enabled	true	Toggle the mod on/off without removing it.
FirePotionStatusEffect	GP_MeadFireResist	Prefab name prefix of the "fire potion" status effect. Change this if a modded mead should also count.

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How it works (for modders)

Five Harmony patches:

1. Character.UpdateLava prefix — zeroes m_inLava and m_aboveOrInLavaTimer for the local player each frame so the lava damage tick never fires.
2. EffectArea.DamageArea prefix — skips the call entirely for the local player on Burning/Heat type areas (campfires, fire floors, etc.).
3. Character.ApplyDamage prefix — strips m_damage.m_fire from any hit that has no enemy attacker before the damage lands.
4. SEMan.AddStatusEffect prefix — blocks SE_Burning from being applied to the local player unless the current hit came from an enemy (tracked via patch 5).
5. Character.RPC_Damage prefix/postfix — sets a thread-local flag indicating whether the hit in progress originated from a non-player character, used by patch 4.

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Compatibility

• Tested against the Valheim assembly included in this repo (assembly_valheim.dll).
• Should be compatible with most content mods since we only patch behaviour for the local player.
• If you use a mead that grants fire resistance under a different prefab name, update FirePotionStatusEffect in the config.