NoArbitraryIncompatibilityFlag

A BepInEx patcher that removes incompatibility restrictions from RtD mods, allowing them to work alongside other popular Valheim mods.

What Does It Do?

This patcher removes [BepInIncompatibility] attributes from RtD mods, enabling you to use them together with mods that were previously blocked. The mods themselves work fine together - this simply removes the restrictions.

Affected RtD Mods:

RtDOcean
RtDVines
RtDMonsters
RtDSouls & RtDSouls_Addon
RtDBiomes
RtDMonstrum
RtDDungeons
RtDFairyTale
RtDGardening
RtDHorrors
RtDItems
RtDMagic

Previously Blocked Mods (Now Compatible):

CookieMilk.MagicalMounts
CookieMilk.MajesticChickens
CookieMilk.BuildPieces
CookieMilk.CarryMeMaster
CookieMilk.DiscordControl
CookieMilk.UltimateServerControl
Therzie.MonstrumDeepNorth
Therzie.WarfareFireAndIce
Therzie.Monstrum
Therzie.Armory
Therzie.Wizardry
Therzie.Warfare
blacks7ar.MagicPlugin
blacks7ar.MagicRevamp
blacks7ar.SeedBed
blacks7ar.OreMines
blacks7ar.BowPlugin
randyknapp.mods.epicloot

Installation

IMPORTANT: This is a PATCHER, not a regular plugin!

Download NoArbitraryIncompatibilityFlag.dll
Place it in BepInEx/patchers/ folder (NOT plugins!)
Launch the game
The patcher will automatically process RtD mods on startup

How It Works

The patcher runs during BepInEx's preloader phase (before plugins are loaded) and uses Mono.Cecil to:

Remove incompatibility attributes from RtD mod DLLs
Modify initialization code to bypass compatibility checks
Preserve all mod functionality while removing restrictions

On first launch with a new RtD mod, you'll see something like:

Patching RtD[ModName].dll...
  Removed 19 incompatibility flag(s)
  Rebuilt Awake() with X initialization methods
  Bypassed integrity checks
Successfully patched 1 RtD mod(s). Removed 19 incompatibility flags.

On subsequent launches (if already patched):

Patching RtD[ModName].dll...
All 1 RtD mod(s) already patched.

FAQ

Q: Is this safe?
A: Yes. The patcher only removes compatibility restrictions. The mods function normally, they just don't block other mods anymore.

Q: Will this break my game?
A: No. If you encounter any issues, they would be unrelated to this patcher. You can always remove the patcher to restore original behavior.

Q: Do I need to reinstall after RtD mod updates?
A: No. The patcher runs on every launch and automatically processes any new or updated RtD mods.

Q: Can I upgrade from an older version of this patcher?
A: Yes. Just replace the old DLL with the new one. The patcher will automatically re-process your RtD mods with the latest techniques.

Q: Will this work with old versions of RtD mods?
A: Yes. The patcher adapts to whatever version you have installed.

Q: What if I want to restore the original DLLs?
A: Simply remove this patcher from the patchers folder and reinstall the RtD mods.

Q: How does this handle compatibility checks?
A: The patcher modifies the mod initialization process to skip compatibility verification while preserving all other functionality.

Technical Details

The patcher uses Mono.Cecil to modify RtD mod assemblies:

Removes [BepInIncompatibility] attributes
Rebuilds initialization methods to skip compatibility checks
Handles integrity verification by preserving method structures while modifying execution flow
All changes are made at the IL bytecode level before BepInEx loads the plugins

Version

1.0.6

Credits

Created to enable mod compatibility and player choice.

License

Free to use, modify, and distribute.

Need a Universal Solution?

If you need to remove incompatibility flags from mods OTHER than RtD mods, there's a universal patcher available:

UniversalIncompatibilityPatcher: https://thunderstore.io/c/valheim/p/IAmOnTheInternetAndNotScared/UniversalIncompatibilityPatcher/

Note: This universal patcher is NOT made by me (IAmOnTheInternetAndItIsScary). The similar username appears to be someone trolling or making a parody. I have no affiliation with that mod. However, if it works for your needs, feel free to use it!

This patcher (NoArbitraryIncompatibilityFlag) is specifically designed for RtD mods and is the original solution.