Free & Open Source Sci-Fi Games

521 free, open-source sci-fi games — real clones and remakes you can download, inspect the source of, and modify.

Original game image

Avara

Clone of Avara

Platforms:Classic Mac OS

LicenseMIT*

Genre: FPS

Theme: Post-Apocalyptic

Battlezone Disassembly

Clone of Battlezone

Platforms:Arcade

LicenseUnknown

Genre: Shooter

Theme: Sci-Fi

Blake4SDL

Clone of Blake Stone: Planet Strike

Platforms:WindowsLinux

LicenseGPL2*

Genre: FPS

Theme: Sci-Fi

Buck Rogers: Planet of Zoom (original game, not this project)

Original game image

Buck Rogers: Planet of Zoom source code for Atari computers

Clone of Buck Rogers: Planet of Zoom

Platforms:Atari

LicenseUnknown

Genre: Shooter

Theme: Sci-Fi

No preview

Cosmic Kidnap

Clone of Cosmic Kidnap

Platforms:Linux

LicenseUnknown

Genre: Action

Theme: Sci-Fi

Cylindrix

Clone of Cylindrix

Platforms:DOS

LicenseLGPL2*

Genre: Shooter

Theme: Sci-Fi

D2X-XL

Clone of Descent

Platforms:WindowsLinuxOSX

LicenseGPL2*

Genre: FPS

Theme: Sci-Fi

Daleks

Clone of Daleks

Platforms:HP calculator

LicenseUnknown

Genre: Turn-Based Strategy

Theme: Sci-Fi

Defendguin

Clone of Defender

Platforms:WindowsLinuxOSX

LicenseGPL2*

Genre: Arcade

Theme: Sci-Fi

Devospace

Clone of Mono Space

Platforms:Windows

LicenseUnknown

Genre: Shmup

Theme: Sci-Fi

Doom Legacy

Clone of Doom

Platforms:WindowsLinux

LicenseGPL2*

Genre: FPS

Theme: Sci-Fi

Doom89

Clone of Doom

Platforms:TI calculator

LicenseGPL3*

Genre: FPS

Theme: Sci-Fi

Dune Legacy

Clone of Dune 2

Platforms:WindowsLinuxOSX

LicenseGPL2*

Genre: Real-Time Strategy

Theme: Sci-Fi

Ecksdee

Clone of Wipeout

Platforms:WindowsLinux

LicenseGPL2*

Genre: Racing

Theme: Sci-Fi

Original game image

Elite : Harmless

Clone of Elite

Platforms:C64

LicenseCC-BY-NC-SA*

Genre: Action

Theme: Sci-Fi

Elite Disassembly

Clone of Elite

Platforms:Apple II

LicenseUnknown

Genre: Action

Theme: Sci-Fi

Elite remake

Clone of Elite

Platforms:WindowsLinux

LicenseUnknown

Genre: Action

Theme: Sci-Fi

Epoch Disassembly

Clone of Epoch

Platforms:Apple II

LicenseUnknown

Genre: Simulation

Theme: Sci-Fi

Original game image

Exile (Enhanced version) disassembly

Clone of Exile

Platforms:BBC Micro

LicenseUnknown

Genre: Action

Theme: Sci-Fi

Firetrack (original game, not this project)

Original game image

FireTrack disassembly

Clone of Firetrack

Platforms:BBC Micro

LicenseUnknown

Genre: Shmup

Theme: Sci-Fi

No preview

Free Fall

Clone of Free Fall

Platforms:BBC Micro

LicenseUnknown

Genre: Action

Theme: Sci-Fi

Frontier 1337

Clone of Elite II

Platforms:PSP

LicenseUnknown

Genre: Action

Theme: Sci-Fi

Original game image

Hover Strike

Clone of Hover Strike

Platforms:Jaguar

LicenseUnknown

Genre: Shooter

Theme: Sci-Fi

Missile Command (original game, not this project)

Original game image

ICBM3D

Clone of Missile Command

Platforms:BeOS

LicenseGPL2*

Genre: Arcade

Theme: Sci-Fi

In Pursuit of Greed

Clone of In Pursuit of Greed

Platforms:WindowsDOS

LicenseUnknown

Genre: FPS

Theme: Sci-Fi

No preview

Intruders for Linux

Clone of Intruders

Platforms:Linux

LicenseGPL2*

Genre: Action

Theme: Sci-Fi

Ironseed (original game, not this project)

Original game image

IronSeedSharp

Clone of Ironseed

Platforms:Windows

LicenseGPL3*

Genre: Simulation

Theme: Sci-Fi

Jake2

Clone of Quake 2

Platforms:None

LicenseGPL2*

Genre: FPS

Theme: Sci-Fi

Star Wars Jedi Knight: Jedi Academy (original game, not this project)

Original game image

JediAcademyLinux

Clone of Star Wars Jedi Knight: Jedi Academy

Platforms:Linux

LicenseGPL2*

Genre: Fighting

Theme: Fantasy

Star Wars Jedi Knight II: Jedi Outcast (original game, not this project)

Original game image

JediOutcastLinux

Clone of Star Wars Jedi Knight II: Jedi Outcast

Platforms:Linux

LicenseGPL2*

Genre: Fighting

Theme: Fantasy

Jump & Roll

Clone of SkyRoads

Platforms:Windows

LicenseGPL2*

Genre: Platform

Theme: Sci-Fi

K8Vavoom

Clone of Doom

Platforms:WindowsLinux

LicenseGPL3*

Genre: FPS

Theme: Sci-Fi

Kiloblaster

Clone of Kiloblaster

Platforms:DOS

LicenseUnknown

Genre: Shooter

Theme: Sci-Fi

Le Projet Doom

Clone of Doom

Platforms:HP calculator

LicenseUnknown

Genre: FPS

Theme: Sci-Fi

MacJJFFE

Clone of Elite III

Platforms:OSX

LicenseUnknown

Genre: Action

Theme: Sci-Fi

Metal Arms: Glitch in the System (original game, not this project)

Original game image

Metal Arms: Glitch in the System Source Code

Clone of Metal Arms: Glitch in the System

Platforms:XboxGameCube

LicenseUnknown

Genre: TPS

Theme: Sci-Fi

Missile Command Disassembly

Clone of Missile Command

Platforms:Arcade

LicenseUnknown

Genre: Arcade

Theme: Sci-Fi

Missile10

Clone of Missile Command

Platforms:DOS

LicenseUnknown

Genre: Arcade

Theme: Sci-Fi

Moon Defense

Clone of Planetary Defense

Platforms:Windows

LicenseUnknown

Genre: Shooter

Theme: Sci-Fi

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