Alternatives and similar repositories for halflife

Users that are interested in halflife are comparing it to the libraries listed below

• id-Software / Quake-2
  Quake 2 GPL Source Release
  ☆3,036Updated last year
• ValveSoftware / source-sdk-2013
  The 2013 edition of the Source SDK
  ☆9,224Updated 2 weeks ago
• id-Software / Quake
  Quake GPL Source Release
  ☆5,378Updated last year
• id-Software / DOOM-3-BFG
  Doom 3 BFG Edition
  ☆5,174Updated last year
• id-Software / wolf3d
  The original open source release of Wolfenstein 3D
  ☆2,360Updated 13 years ago
• rwengine / openrw
  OpenRW "Open ReWrite" is an un-official open source recreation of the classic Grand Theft Auto III game executable
  ☆2,083Updated 2 months ago
• id-Software / DOOM-3
  Doom 3 GPL source release
  ☆3,358Updated 9 years ago
• ioquake / ioq3
  The ioquake3 community effort to continue supporting/developing id's Quake III Arena
  ☆2,582Updated last week
• id-Software / Quake-III-Arena
  Quake III Arena GPL Source Release
  ☆7,548Updated last year
• ValveSoftware / Source-1-Games
  Source 1 based games such as TF2 and Counter-Strike: Source
  ☆731Updated last year
• Croteam-official / Serious-Engine
  An open source version of a game engine developed by Croteam for the classic Serious Sam games.
  ☆3,096Updated 4 years ago
• twhl-community / halflife-updated
  Half-Life SDK updated to compile under VS2019 and 2022. Check README.md for more information.
  ☆439Updated last week
• FWGS / xash3d-fwgs
  Xash3D FWGS engine
  ☆2,042Updated last week
• FWGS / xash3d
  DEPRECATED in favor of https://github.com/FWGS/xash3d-fwgs. Only bugfixes are accepted.
  ☆584Updated 4 years ago
• nillerusr / source-engine
  Modified source engine (2017) developed by valve and leaked in 2020. Not for commercial purporses
  ☆1,880Updated last year
• chocolate-doom / chocolate-doom
  Chocolate Doom is a Doom source port that is minimalist and historically accurate.
  ☆2,138Updated last week
• RobertBeckebans / RBDOOM-3-BFG
  Doom 3 BFG Edition source port with updated DX12 / Vulkan renderer and modern game engine features
  ☆1,661Updated last week
• ZDoom / gzdoom
  GZDoom is a feature centric port for all Doom engine games, based on ZDoom, adding an OpenGL renderer and powerful scripting capabilities
  ☆2,882Updated last week
• dhewm / dhewm3
  dhewm 3 main repository
  ☆1,966Updated last month
• id-Software / quake2-rerelease-dll
  ☆2,191Updated last year
• Novum / vkQuake
  Vulkan Quake port based on QuakeSpasm
  ☆2,018Updated last week
• id-Software / wolf3d-browser
  WOLF3D Browser Version GPL source release
  ☆622Updated 12 years ago
• rehlds / ReGameDLL_CS
  Enhanced server-side GameDLL for Counter-Strike 1.6 (and CS: Condition Zero), offering new features and fixes.
  ☆665Updated 2 weeks ago
• FrictionalGames / HPL1Engine
  A real time 3D engine.
  ☆742Updated 2 years ago
• NightDive-Studio / shockmac
  System Shock (PowerMac version / Official GPL Release)
  ☆1,456Updated 7 years ago
• id-Software / RTCW-SP
  Return to Castle Wolfenstein Single Player GPL Source Release
  ☆594Updated 4 years ago
• kondrak / vkQuake2
  id Software's Quake 2 v3.21 with mission packs and Vulkan support (Windows, Linux, macOS, FreeBSD, Raspberry Pi 4)
  ☆951Updated 7 months ago
• perilouswithadollarsign / cstrike15_src
  Leak of CS:GO Source code, provided by yours truly so go rep me
  ☆1,547Updated last year
• id-Software / Quake-Tools
  The source release of the Quake tools and utilities
  ☆480Updated 13 years ago
• TrenchBroom / TrenchBroom
  Cross-Platform Level Editor
  ☆2,312Updated this week