Open Source

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

See Also: Open Source Initiative (OSI) approved licenses

Displaying 25 - 36 of 733 games in this category. All games

id Tech 1

The Doom engine, also known as id Tech 1, is the game engine that powers the id Software games Doom and Doom II: Hell on Earth.
Genre: Action

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

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

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

Pentagram

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

Exult

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

OpenTomb

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

OpenRCT2

The OpenRCT2 project recreates the classic hit RollerCoaster Tycoon 2 into open-source code, expanding the game with new features,...
Genre: Simulation

The Clue! SDL

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