Alternatives and similar repositories for halflife

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

• misyltoad / HL2-GamepadUI
  Source code for GamepadUI for Half-Life 2 and friends.
  ☆135Updated last year
• CoaXioN-Games / coplay
  An implementation to use Steam Networking Sockets in the Source SDK
  ☆34Updated 8 months ago
• misyltoad / VAudio-MiniMP3
  Replacement MP3 playback module for the Source Engine
  ☆50Updated last year
• Source-SDK-Archives / source-sdk-2004
  Original HL2 Source SDK from 2004
  ☆56Updated 4 years ago
• leonill007 / vgui.css
  CSS Classic Green UI Skin from Goldsource games and the early Steam design and Grey UI Skin from Source games
  ☆51Updated last year
• twhl-community / HalfLife.UnifiedSdk.MapDecompiler
  Cross-platform Half-Life 1 map decompiler
  ☆79Updated last year
• TF2V / TF2Vintage
  The repository to the Sourcemod Team Fortress 2: Vintage, a community created museum and recreation of the early period of TF2.
  ☆27Updated 2 months ago
• twhl-community / halflife-unified-sdk
  Half-Life Updated SDK with Opposing Force and Blue Shift merged in, along with other improvements. Check README.md for more information.
  ☆160Updated 9 months ago
• EpicSentry / P2ASW
  The Portal 2 In Alien Swarm Engine project repository
  ☆57Updated last year
• rtbr-opensource / rtbr-open-source
  The open source edition of Raising the Bar: Redux.
  ☆45Updated 3 weeks ago
• nooodles-ahh / video_services
  A WIP drop-in replacement for Source SDK 2013's video services that plays webms
  ☆35Updated last year
• SCell555 / 7zip-vpk
  VPK format provider for 7-Zip
  ☆59Updated 3 years ago
• ENDERZOMBI102 / Aurora-Source
  Aurorians's custom version of the Source SDK 2013
  ☆28Updated 3 weeks ago
• supadupaplex / ps2-hl-tools
  Tools for Playstation 2 Half-Life port
  ☆43Updated 3 years ago
• QtPyHammer-devs / QtPyHammer
  python alternative to Valve's "Hammer World Editor"
  ☆42Updated last year
• hoaxer / Half-Life-Decay
  Half-Life Decay PC project, coordinated by me back in 2008
  ☆34Updated 3 years ago
• URAKOLOUY5 / portal2-sdk13
  Portal 2 assets converted to use in Source SDK 2013
  ☆24Updated last year
• wootguy / SevenKewp
  Half-Life Co-op mod
  ☆33Updated last week
• StrataSource / vtex2
  Deprecated in favor of: https://github.com/craftablescience/MareTF
  ☆64Updated 7 months ago
• sapphonie / sdk13-gigalib
  library for sdk2013 mods to use if they so choose
  ☆22Updated 8 months ago
• twhl-community / halflife-op4-updated
  Half-Life: Opposing Force SDK based on Half-Life Updated, with bug fixes. Check README.md for more information.
  ☆80Updated last month
• entropy-zero / source-sdk-2013
  The 2013 edition of the Source SDK modified for Entropy : Zero.
  ☆92Updated this week
• SourceEnginePlayground / Hyperborea
  ☆25Updated 7 years ago
• wootguy / bspguy
  Edit GoldSrc maps without decompiling
  ☆148Updated 2 months ago
• Petercov / Source-PlusPlus
  ☆33Updated 5 years ago
• FreeSlave / halflife-featureful
  Half-Life SDK for making mods upon it
  ☆51Updated this week
• Source-Authors / Obsoletium
  Modified Source Engine (2018) from Valve 🎮🧩🕹️👾
  ☆44Updated last week
• kolessios / sourcebots
  Artificial intelligence to create Bots in Source Engine.
  ☆22Updated 4 years ago
• SCell555 / sdk-2013-deferred
  ☆33Updated 6 years ago
• IntriguingTiles / HLFixes
  Fixing bugs in GoldSrc
  ☆30Updated 6 months ago