OpenRA is an open source project that recreates and modernizes classic real time strategy games such as Red Alert, Command & Conquer and Dune 2000. Playtest builds add single-player content, multiplayer and skirmish balance changes, AI improvements and engine updates.
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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.
Mugenguild is a gaming resource for guides, communities, tools, game discovery, or reference links.
Mugenfreeforall is a gaming resource for guides, communities, tools, game discovery, or reference links.
Luanti is a gaming resource for guides, communities, tools, game discovery, or reference links.
Locomalito is a personal site for an amateur developer creating new-classic video games. It lists titles including Maldita Castilla, Hydorah, The Curse of Issyos, l'Abbaye des Morts, Gaurodan, Darkula and Verminest, with release years from 2008 to 2024. The page mentions pixel art, chiptunes and challenging action games.
KeeperFX is an open-source remake and fan expansion of the game Dungeon Keeper, making it run on modern machines and adding fan-made content. It requires the original game files to operate. Features include Windows 7/10/11 support, higher screen resolutions, modernized controls, bugfixes, additional campaigns and maps, new creatures, textures and sprites, and multiplayer.
ITGmania is a free, open source, community-driven dance game for Windows, Mac, and Linux. It can be played with a dance pad or keyboard. It includes built-in networking with online leaderboard support via GrooveStats, unlock downloading for events, and the Simply Love theme pre-installed. It is backwards compatible with StepMania 5 themes.
IOQuake3 is a gaming resource for guides, communities, tools, game discovery, or reference links.
Play an open source civilization strategy game.
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.
Falcon BMS is a free flight simulator focused on F-16 simulation, based on Falcon 4.0 with a first release in 2003. It offers a dynamic campaign set on the Korean peninsula with six scenarios, modeled F-16 flight dynamics and systems across multiple blocks and variants, AI units, additional planes, and DirectX 11 with VR support.
EDuke32 is a free homebrew game engine and source port of Duke Nukem 3D to Windows, Linux, macOS, FreeBSD and several handhelds. It adds features and upgrades for players and editing and scripting extensions for mod and homebrew developers. It is open source software and free to use for all non-commercial purposes.
DFWorkshop is a gaming resource for guides, communities, tools, game discovery, or reference links.
DevilutionX is a port of Diablo and Hellfire intended to simplify running the game while adding engine improvements, bugfixes and optional quality of life features. Installation involves downloading a release, extracting it, copying the required MPQ files to the same location and running the devilutionx executable. Supported platforms listed include Xbox, Android TV and experimental RG99.
Decomps is a gaming resource for guides, communities, tools, game discovery, or reference links.
Cytoid is a gaming resource for guides, communities, tools, game discovery, or reference links.
Custom Songs Central is a site offering custom charts, song packs and setlists for Clone Hero, with more than 5,000 charts available to download. It also publishes tutorials and community projects, including song packs, full albums and esports rulesets.
Cubyz is a gaming resource for guides, communities, tools, game discovery, or reference links.
CorsixTH is an open source project that re-implements the game engine of Theme Hospital and loads the original game data files. It aims to serve as a base for extensions and improvements to the original game. Playing requires the demo or the full Theme Hospital game.
ClassiCube is a free multiplayer sandbox block game. It can be played in the browser, and downloads are offered. The complete client source code is hosted on GitHub. A Steam version is described as optional support for the game's financial needs, and it is not required to play.
Arx Libertatis is an open source, cross-platform port of Arx Fatalis, a 2002 first-person role-playing game by Arkane Studios. It is based on the publicly released source code and licensed under GPL 3+, and the game data must be obtained separately. Builds are provided for Windows and Linux, and the engine is packaged for macOS and several BSD systems.
Andersonkenya1 is a gaming resource for guides, communities, tools, game discovery, or reference links.
Reddit link points to a Reddit community or thread with discussion, guides, troubleshooting, or shared resources.