Free & Open Source Horror Games
82 free, open-source horror games — real clones and remakes you can download, inspect the source of, and modify.
Sporadic
Halted
Original game image
Original game imageClone of Five Nights at Freddy's
A halted, semi-playable open-source Five Nights at Freddy's project built with the gLib2D library.
Active
Clone of Amnesia: The Dark Descent
A from-scratch Vulkan-based rework of Amnesia: The Dark Descent's engine with ray-traced global illumination, needing a retail copy.
Halted
Clone of Alien 3
This repository preserves Michael J Archer's complete 6502 assembly source code for the Commodore 64 version of Alien 3.
Active
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Original game imageClone of Castlevania
A work-in-progress decompilation of Castlevania for the Nintendo 64 that needs your own legally obtained ROM.
Stars63
Updated1 month ago
LicenseUnknown
Release2023
Genre: Action
Theme: Horror
ActiveOriginal game image
Original game imageClone of Castlevania
A work-in-progress decompilation of Castlevania for the Nintendo 64. It aims to rewrite C code that compiles to the assembly found in the…
Stars63
Updated1 month ago
LicenseUnknown
Release2023
Genre: Action
Theme: Horror
Halted
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Original game imageClone of Fatal Frame II: Crimson Butterfly
A decompilation of Fatal Frame II: Crimson Butterfly that aims for a fully playable PC port.
Active
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Original game imageClone of Alien Breed 3D II: The Killing Grounds
An actively maintained rebuild of the Alien Breed 3D II: The Killing Grounds engine, compatible with original game data or mods.
Halted
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Original game imageClone of Nitemare 3D
A partial C# reimplementation of the 1994 FPS Nitemare 3D that loads the original maps, images and music.
Halted
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Original game imageClone 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.
Halted
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Original game imageClone 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.
Halted
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Original game imageClone of Transylvania
Re-Comprehend is a public-domain reimplementation of the Graphics Magician engine behind Transylvania, Crimson Crown, and Oo-Topos.
Active
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Original game imageClone of Castlevania: Symphony of the Night
A statically recompiled build of Castlevania: Symphony of the Night for Android, run from your own disc dump.
Active
Clone of Dungeon Keeper
An actively developed fork of OpenDungeons, the Dungeon Keeper-inspired open-source dungeon-building RTS.
Platforms:WindowsLinux
Stars28
Updated2 months ago
LicenseUnknown
Release2014
Genre: Simulation
Theme: Horror
Active
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Original game imageClone of Alien Breed
An in-progress C# reimplementation of Team17's Alien Breed games, with an asset editor; not yet playable.
Halted
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Original game imageClone 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.
Active
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Original game imageClone of X-COM: UFO Defense
A native port of OpenXcom Extended 8.6.1 to the New Nintendo 3DS, supporting UFO Defense and Terror From the Deep.
Halted
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.
Halted
Clone of X-COM: UFO Defense
Halted
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Original game imageClone 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.
Sporadic
Halted
Clone of X-COM: UFO Defense
A turn-based strategy game for Win32 and Android inspired by the classic X-COM series.
Active
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Original game imageClone 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.
Active
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Original game imageClone of Resident Evil 3: Nemesis
A release-candidate PSXRecomp-based recompilation of Resident Evil 3: Nemesis that needs your own disc, SBI file and BIOS.
Stars3
Updated1 month ago
LicenseUnknown
Release2026
Genre: Action
Theme: Horror
Sporadic
Clone of Castlevania
pyxelvania is a small Castlevania-inspired platform game built with the Pyxel game engine.
Active
Clone of Diablo
A static recompilation of Diablo built on psxrecomp and recomp-ui, targeting Windows x64, Linux x64 and macOS in a v0.1.1 candidate.
Active
Clone of Legacy of Kain: Soul Reaver
A static recompilation of Legacy of Kain: Soul Reaver built on psxrecomp; you must own the game and supply a BIOS.
Stars2
Updated1 month ago
LicenseUnknown
Release2026
Genre: Action
Theme: Fantasy
Active
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Original game imageClone of X-COM: Terror from the Deep
An open-source MonoGame remake of X-COM: UFO Defense (UFO: Enemy Unknown), originally built in XNA around 2007.
Halted
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Original game imageClone 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.
Sporadic
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Original game imageClone of Five Nights at Freddy's 2
A decompilation of the Five Nights at Freddy's 2 Windows Phone app, currently marked unplayable.
SporadicOriginal game image
Original game imageClone 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
Updated1 year ago
LicenseUnknown
Release2025
Genre: survival horror
Theme: Horror
Halted
Sporadic
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.
Halted
Clone of House of Death
