Before you begin

Inventory

What you need§

Almost nothing. Two archives, one zip, and an unpacker that understands .rar.

The game

Blasphemous on Windows, any storefront. All DLC is supported and none of it is required — this guide was written against build 4.0.67 — DLC3, the current release with all three DLC installed.

Windows

Windows 10 or 11, 64-bit. Blasphemous ships a 64-bit Unity player, so everything below is the 64-bit path.

An unpacker

Both Ungodly downloads are .rar archives. 7-Zip, NanaZip or WinRAR all open them. Windows 11 can open RAR files in Explorer on its own; Windows 10 cannot, so on 10 you do need one of the three.

Disk space

About 5 MB for BepInEx and 350 KB for both plugins together. The configuration files the plugins write are another 110 KB.

Admin rights

Not needed, unless you installed the game somewhere Windows protects — see the note below.

Read this twice

The download people get wrong§

BepInEx publishes a lot of files under one release, and only one of them is right for this game. If the plugins do not appear in your log later, this is almost always why.

Version numbers move. What must not change is the shape of the name: 5.x, win, x64. Any BepInEx 5 release from 5.4.21 upward works here; 5.4.23.5 is the one both plugins were verified against and the one this guide screenshots.

Before the first file moves

Five minutes of preparation§

1. Close the game completely

   Not minimised, not sitting on the main menu — closed. Files in the game folder are locked while the process is alive, and a half-written winhttp.dll is a mess to diagnose.

2. Verify the game files once

   On Steam: right-click Blasphemous → Properties → Installed Files → Verify integrity of game files. On GOG Galaxy: the game’s menu → Manage installation → Verify / Repair. It takes a minute and it means that anything odd after this point is something you installed, not something that was already broken.

3. Back up your saves

   Neither plugin writes to a save file, and neither modifies a game asset. Back them up anyway — it costs one copy-and-paste and it removes the entire category of worry.

   Paste this into the Explorer address bar:

Inside is a folder named after your account ID, holding the save files and options_settings.json. Copy the whole Savegames folder somewhere safe. If you play through Steam, Steam Cloud is already keeping a copy as well, but a local one costs nothing.

4. Decide about your antivirus now, not later

   BepInEx works by putting a file called winhttp.dll next to the game executable so Windows loads it instead of the system copy. That is a legitimate, well-known technique — and it is also structurally identical to what a DLL-hijacking attack looks like, so a small number of security products flag it on sight.

   If yours quarantines the file, add an exclusion for the Blasphemous game folder specifically, rather than switching protection off. If yours says nothing, you have nothing to do.

The one habit worth forming

Unblock before you extract§

Windows attaches a hidden marker to every file that arrives from the internet. Some .NET hosts refuse to load a DLL carrying that marker, and the failure is silent — the plugin simply never appears in the log.

The fix is trivial, and doing it in the right order saves repeating it:

1. Right-click the downloaded .rar or .zip → Properties.

   Look at the bottom of the General tab.

2. If a Unblock checkbox is there, tick it, then Apply.

   If there is no checkbox, Windows never marked the file and there is nothing to do.

3. Extract afterwards.

   This is the part that matters. Unblocking the archive first means every file that comes out of it is already clean. Extract first and you have to unblock each extracted file by hand.

That clears the marker from everything underneath, and it is safe to run on a folder that was never blocked.

Boundaries

What this guide does not cover§

• Linux, macOS and Steam Deck. BepInEx supports them through its Unix builds and a launch script, but the file layout and the launch options differ enough that following Windows instructions there will not work. Both plugins call into Win32 for monitor enumeration, so Ungodly GFX in particular expects Windows.
• Other Blasphemous mods. Anything else built on BepInEx 5 sits alongside these two with no special handling — that is what a plugin folder is for. If a mod ships its own loader or its own bundled copy of BepInEx, install that one first and add these on top, rather than the other way round.
• Cheat tables, trainers and save editors. Nothing here touches memory from outside the process or edits a save file. Ungodly Difficulty does include god-mode and one-hit-kill switches, but they are ordinary settings applied through the game’s own systems.
• Multiplayer. Blasphemous does not have any.