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Doom 64: Unseen Evil

Mod for Doom II: Hell on Earth (1994) | Category: Gameplay

Author: DrPyspy | Curator: User AvatarModbadger

Mod for Doom II: Hell on Earth (1994) | Category: Gameplay

Author: DrPyspy | Curator: User AvatarModbadger

Doom 64: Unseen Evil is a mod for GZDoom that brings the atmosphere of Doom 64 to Doom and Doom II. The player, weapons, levels, and demons are completely overhauled, new monsters and the Doom 64 arsenal are added, and animations and sounds are improved.

Uploaded30.01.2026 16:15
Version1.0.3
Size47.00 MB
Views0
Downloads0

Localizations:

English

The mod is localized into 1 language

(You don’t need to download anything extra to play in these languages)

Doom 64: Unseen Evil allows you to replay the original Doom and Doom II levels with a new atmosphere and slightly modified mechanics, while preserving the spirit of the classic series.

The player has access to the entire Doom 64 arsenal, including the Unmaker, and weapon animations and their speed have been improved for a more dynamic and powerful shooting experience. Monsters missing from the original Doom have been added and adapted to the Doom 64 style — Chaingunner, Revenant, Arch-vile, and Spider Mastermind. On the exclusive Redemption Denied difficulty, monsters from PSX Doom appear, adding new challenges for experienced players.

A special Terraformer function analyzes and transforms any Doom and Doom II levels into the Doom 64 aesthetic, applying lighting, gradients, and color effects, as well as replacing textures with corresponding ones from Doom 64 and custom resources. The mod is fully compatible with vanilla levels, though new or modified textures in third-party compilations may display incorrectly.

Additionally, the visual readability of levels has been improved: zombie and sergeant sprites have been modified, and the visibility of objects, doors, and switches has been enhanced. The musical accompaniment can be customized: either keep the Doom 64 tracks or enable vanilla music.

How to install a mod Doom 64: Unseen Evil

To run the mod, you will need the GZDoom engine and doom.wad, doom2.wad, or one of the FreeDoom IWADs

  1. Make sure that doom.wad / doom2.wad or freedoom1.wad / freedoom2.wad is located in the GZDoom folder

  2. Move the mod's .pk3 file to the GZDoom folder

  3. Drag and drop the .pk3 file onto gzdoom.exe

  4. Play!

You can also create a Launcher.bat. This is useful for launching more complex mod builds where the loading order of mods is important, or to launch the game via a shortcut.

How to create a launcher for running mods based on GZDoom

Create a text file in the GZDoom folder, you can name it Launcher. The text can look like this, depending on which files you're using:

gzdoom.exe -iwad freedoom2.wad -file "brutalv22test4.pk3"

-iwad must always be first, and the number of files after -file can be unlimited, just write them in quotes separated by spaces, like this:

gzdoom.exe -iwad doom2.wad -file "addon1.pk3" "addon2.pk3" "addon3.pk3" "addon4.pk3"

Change its format from .txt to .bat by simply renaming it. Now you can launch your builds with a double-click on this launcher.