Open Source

The engine and all game files are released under an open source license.

See Also: Open Source Initiative (OSI) approved licenses

Displaying 133 - 144 of 841 games in this category. All games

Quake engine

The Quake engine is the game engine developed by id Software to power their 1996 video game Quake.

id Tech 2

id Tech 2, popularly known as the Quake II engine, is a game engine developed by id Software for use in their games, most notably Quake II.

Dune Legacy

Dune Legacy is an effort by a handful of developers to revitalize the first-ever real-time strategy game.
Genre: Strategy


Nuvie, pronounced 'New-Vee' is an open sourced game engine for playing Origin's games Ultima 6, Martian Dreams and Savage Empire on...
Genre: Role-playing

Iris 2

Iris 2.0 is a cross-platform open-source 2D/3D client for playing the MMORPG Ultima Online on Freeshards
Genre: Role-playing


XU4 is a remake of the computer game Ultima IV.
Genre: Role-playing


Pentagram is a project aiming to create an Ultima 8 engine for use on modern operating systems, including Linux, Mac OS X and Windows.
Genre: Role-playing


As computers evolve, we risk losing classic games from the not-so-distant past.
Genre: Role-playing


OpenTomb is a cross-platform reimplementation of classic Tomb Raider 1—5 engines that were developed by now defunct Core Design.


0.0.6 (29 Jan 2017)
The OpenRCT2 project recreates the classic hit RollerCoaster Tycoon 2 into open-source code, expanding the game with new features,...

The Clue! SDL

A complete engine rewrite for the free The Clue! game
Genre: Adventure


A faithful clone of the brilliant simulation game The Settlers 1 aka Serf City.
Genre: Strategy