OpenMW is an open-source reimplementation of the Morrowind game engine that supports playing Morrowind. The project publishes releases, currently version 0.51.0, with notes about scripting API additions, terrain vertex painting in its content file editor and save compatibility. Saves from newer releases cannot be loaded in older releases.
Quaver is a community-driven, open-source competitive rhythm game available on Steam. The site lists mapsets and scores and links to a wiki covering gameplay, editor, rules, skins, multiplayer and ranking. A v1.7 client update added features, improvements and bug fixes.
FlightGear is a free open-source flight simulator for Windows, macOS and Linux, with source code available under the GNU GPL license. Its hangar contains dozens of aircraft, helicopters, spacecraft and other vehicles, scenery is automatically fetched and updated, and multiplayer servers are provided, with connection to the VATSIM network for live ATC coverage.
Open Source Game Clones is a site gathering open-source or source-available remakes of old games in one place. It lists clones, remakes, official source releases, similar games and tools such as patches and resource extractors, and invites contributions through its GitHub repository.
Geode is a fan-made extension for Geometry Dash that adds mod support to the game. It is open-source and offers an in-game mod list for Windows, macOS, Android and iOS, along with a hooking syntax and built-in UI components for modders. The site notes that Geode is currently broken after the Geometry Dash 2.2091 update and that a fix is in progress.
An unofficial fan project providing a higher framerate, enhancements and cheats, and a built-in randomizer for the game. Available platforms are listed, and changes to the authentic game are placed behind toggles.
Aleph One is an open source continuation of Bungie's Marathon 2 game engine, available for macOS, Windows and Linux. It supports Marathon, Marathon 2 and Marathon Infinity natively, along with third party scenarios and net maps. Up to 8 players can join multiplayer matches or co-op play, with games hosted peer-to-peer over LAN or the Internet and a global matchmaking lobby.
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Quaver is a community-driven, open-source competitive rhythm game available on Steam. The site lists mapsets and scores and links to a wiki covering gameplay, editor, rules, skins, multiplayer and ranking. A v1.7 client update added features, improvements and bug fixes.
FlightGear is a free open-source flight simulator for Windows, macOS and Linux, with source code available under the GNU GPL license. Its hangar contains dozens of aircraft, helicopters, spacecraft and other vehicles, scenery is automatically fetched and updated, and multiplayer servers are provided, with connection to the VATSIM network for live ATC coverage.
Open Source Game Clones is a site gathering open-source or source-available remakes of old games in one place. It lists clones, remakes, official source releases, similar games and tools such as patches and resource extractors, and invites contributions through its GitHub repository.
Geode is a fan-made extension for Geometry Dash that adds mod support to the game. It is open-source and offers an in-game mod list for Windows, macOS, Android and iOS, along with a hooking syntax and built-in UI components for modders. The site notes that Geode is currently broken after the Geometry Dash 2.2091 update and that a fix is in progress.
An unofficial fan project providing a higher framerate, enhancements and cheats, and a built-in randomizer for the game. Available platforms are listed, and changes to the authentic game are placed behind toggles.
Aleph One is an open source continuation of Bungie's Marathon 2 game engine, available for macOS, Windows and Linux. It supports Marathon, Marathon 2 and Marathon Infinity natively, along with third party scenarios and net maps. Up to 8 players can join multiplayer matches or co-op play, with games hosted peer-to-peer over LAN or the Internet and a global matchmaking lobby.
