Free & Open Source Horror Games

69 free, open-source horror games — real clones and remakes you can download, inspect the source of, and modify.

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OpenNitemare3D

Clone of Nitemare 3D

A partial C# reimplementation of the 1994 FPS Nitemare 3D that loads the original maps, images and music.

Platforms:Windows

Stars51

Updated4 years ago

LicenseGPL-3.0

Release2019

Genre: FPS

Theme: Horror

Halted

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Reevengi

Clone of Resident Evil

Reevengi is a background image and 3D model viewer for the original PS1/PC Resident Evil 1-3 games, not a reimplementation.

Platforms:WindowsLinux

Stars43

Updated3 years ago

LicenseGPL-2.0

Release2019

Genre: Action

Theme: Horror

Halted

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Escape from Monster Manor

Clone of Escape from Monster Manor

The official source-code release of Escape from Monster Manor, a 1993 3DO game, though only the engine code is included, not assets.

Platforms:3DO

Stars32

Updated3 years ago

LicenseMIT

Release2022

Genre: FPS

Theme: Horror

Halted

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Re-Comprehend

Clone of Transylvania

Re-Comprehend is a public-domain reimplementation of the Graphics Magician engine behind Transylvania, Crimson Crown, and Oo-Topos.

Platforms:Linux

Stars32

Updated11 years ago

LicenseCC0-1.0

Release2015

Genre: Adventure

Theme: Horror

Active

OpenDungeonsPlus

Clone of Dungeon Keeper

An actively developed fork of OpenDungeons, the Dungeon Keeper-inspired open-source dungeon-building RTS.

Platforms:WindowsLinux

Stars28

Updated21 days ago

LicenseUnknown

Release2014

Genre: Simulation

Theme: Horror

Active

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OpenBreed

Clone of Alien Breed

An in-progress C# reimplementation of Team17's Alien Breed games, with an asset editor; not yet playable.

Platforms:Windows

Stars19

Updated17 days ago

LicenseUnknown

Release2018

Genre: action game

Theme: Horror

Halted

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AB3D-RTG

Clone of Alien Breed 3D

An Amiga build of John Girvin's Alien Breed 3D source, reviving the Chunky-Copper renderer for RTG output; currently unplayable.

Platforms:Amiga

Stars7

Updated4 years ago

LicenseUnknown

Release2021

Genre: FPS

Theme: Horror

Halted

Alien Breed 3D I

Clone of Alien Breed 3D

A rebuild of Alien Breed 3D I for AGA Amiga from the original source, requiring original data files; playable, but development has halted.

Platforms:Amiga

Stars6

Updated1 year ago

LicenseUnknown

Release2023

Genre: FPS

Theme: Horror

Halted

EXLCOM

Clone of X-COM: UFO Defense

Platforms:Excel

Stars6

Updated2 years ago

LicenseUnknown

Release2023

Genre: Strategy

Theme: Horror

Halted

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HauntedHouse

Clone of Haunted House

A recreation of the Atari 2600 game made for a one-game-a-month challenge, with only 2 of the original's 9 variations completed.

Platforms:None

Stars4

Updated13 years ago

LicenseUnknown

Release2013

Genre: Action

Theme: Horror

Sporadic

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Lilium Salvation

Clone of Dark Salvation

An open-source engine reimplementation compatible with Dark Salvation, built without the original source, targeting Linux and macOS.

Platforms:LinuxOSX

Stars4

Updated4 months ago

LicenseGPL-2.0

Release2021

Genre: FPS

Theme: Adult

Halted

Xenowar

Clone of X-COM: UFO Defense

A turn-based strategy game for Win32 and Android inspired by the classic X-COM series.

Platforms:OSXAndroidiOS

Stars4

Updated4 years ago

LicenseUnknown

Release2022

Genre: Strategy

Theme: Horror

Active

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v64tng

Clone of The 7th Guest

A from-scratch C++23 reimplementation of The 7th Guest's engine, built to run inside the original game's own data files.

Platforms:Windows

Stars4

Updated12 days ago

LicenseMIT

Release2023

Genre: Adventure

Theme: Horror

Sporadic

pyxelvania

Clone of Castlevania

pyxelvania is a small Castlevania-inspired platform game built with the Pyxel game engine.

Platforms:None

Stars3

Updated6 months ago

LicenseMIT

Release2024

Genre: Action

Theme: Horror

Active

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Project: Xenocide

Clone of X-COM: UFO Defense

An open-source MonoGame remake of X-COM: UFO Defense (UFO: Enemy Unknown), originally built in XNA around 2007.

Platforms:Windows

Stars2

Updated2 months ago

LicenseMIT

Release2016

Genre: Strategy

Theme: Horror

Halted

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Soul Reaverse

Clone of Legacy of Kain: Soul Reaver

An in-progress source reconstruction of PS1's Legacy of Kain: Soul Reaver, built from a debug-symbol-rich prototype, about 58% complete.

Platforms:PS

Stars1

Updated1 year ago

LicenseCC0-1.0

Release2024

Genre: Action

Theme: Fantasy

Sporadic

No preview

FNaF 2 Decomp

Clone of Five Nights at Freddy's 2

A decompilation of the Five Nights at Freddy's 2 Windows Phone app, currently marked unplayable.

Platforms:Windows Phone

Stars0

Updated11 months ago

LicenseUnknown

Release2025

Genre: Adventure

Theme: Horror

Sporadic

No preview

FNaF Decomp

Clone of Five Nights at Freddy's

A decompilation of the original Five Nights at Freddy's Windows Phone app, currently marked unplayable.

Platforms:Windows Phone

Stars0

Updated11 months ago

LicenseUnknown

Release2025

Genre: survival horror

Theme: Horror

Halted

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Halloween 3D

Clone of Halloween: The New Nightmare

A work-in-progress, open-source 3D shooter written in C++ with OpenGL rendering, supporting lights, scenes, entities, and a camera system.

Platforms:Linux

Stars0

Updated4 years ago

LicenseGPL-3.0

Release2021

Genre: FPS

Theme: Horror

Sporadic

Leftovers Decomp

Clone of Leftovers

An early-stage decompilation of the game Leftovers; as of this snapshot, the mouse logic used for answering doesn't work yet.

Platforms:None

Stars0

Updated8 months ago

LicenseUnknown

Release2025

Genre: Adventure

Theme: Horror

Halted

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djavul

Clone of Diablo

djavul is an open-source reference re-implementation of the Diablo 1 engine aiming for pixel-perfect parity, currently marked unplayable.

Platforms:WindowsLinux

Stars0

Updated7 years ago

LicenseUnlicense

Release2019

Genre: RPG

Theme: Horror

No preview

Abuse

Clone of Abuse

Platforms:LinuxOSX

LicensePD, WTFPL, GPL2*

Genre: Action

Theme: Horror

Dungeon Digger

Clone of Dungeon Keeper

Platforms:WindowsLinux

LicenseGPL2*

Genre: Simulation

Theme: Horror

Eldritch

Clone of Eldritch

A first-person roguelike immersive-sim with Lovecraftian horror, random levels, and mystical powers, on itch.io for Windows, macOS, Linux.

Platforms:WindowsLinuxOSX

LicenseUnknown

Genre: FPS

Theme: Horror

House Of Death remake

Clone of House of Death

Platforms:Windows

LicenseUnknown

Genre: Adventure

Theme: Horror

No preview

POSTAL (Dreamcast)

Clone of Postal

Platforms:Dreamcast

LicenseGPL2*

Genre: Shooter

Theme: Horror

Summoning Wars

Clone of Diablo

Platforms:WindowsLinux

LicenseGPL3*

Genre: RPG

Theme: Horror

UFO2000

Clone of X-COM: UFO Defense

Platforms:WindowsLinux

LicenseGPL2*

Genre: Strategy

Theme: Horror

UFO: Alien Invasion

Clone of X-COM: UFO Defense

Platforms:WindowsLinuxOSX

LicenseGPL2*

Genre: Strategy

Theme: Horror

X-Force: Fight For Destiny

Clone of X-COM: UFO Defense

Platforms:Windows

LicenseGPL2*

Genre: Strategy

Theme: Horror

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