Template:Goldsrc branches

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Year	Version / Game	Company	Features	Base	Notes
1998 - 1999	v1.0.x.x/SDK v1 Old WON	Valve Software	Per-texture palettes Colored lighting Skeletal Models Support for HW accelerated audio (EAX/A3D)	Quake (id Tech 2)	v30 .bsp, v10 .mdl
2000 - 2001	v1.1.0.x/SDK v2.0 New WON Counter-Strike 1.0 - 1.3	Valve Software	VGUI Prediction-based Networking Miles Sound System (since 2001)	Old WON	v30 .bsp, v10 .mdl VGUI was introduced with May 25, 2000 update (1.1.0.0), used for new Scoreboard (replacing old Opposing Force/text-based scoreboard), and the console & chat font was also changed to be slightly bigger (plus removing the orange gradient on the font). The netcode (originally from QuakeWorld), has been replaced or significantly updated in 2001, adding prediction-based networking.
2002	v1.1.0.9-v1.1.1.0/SDK v2.0 v1.0.1.4 (Steam Beta) New WON & Steam Beta Counter-Strike 1.4 & 1.5 Day of Defeat Beta 1.3	Valve Software	VGUI2 (since 2002) Steam Beta/Tracker (optional, since 2002) VAC 1.0	New WON	v30 .bsp, v10 .mdl In 2002, the late WON build around 1.1.0.9 was the first version to support Steam Beta (and Tracker). Most users at the time did not use Steam Beta and install Steam Tracker so players will see "Tracker Error: TrackerUI.dll invalid, not loading", however user was able to open Half-Life Desktop overlay by pressing F1, providing limited functionality (Resume and Quit game option only) for those who did not have Steam Beta installed. VGUI2 was also introduced at the same time with Steam Beta, and used for Tracker feature aswell.
2001 (leak)[Clarify]	Dreamcast	Captivation Digital Laboratories Gearbox Software	Compressed model textures	v1.0.1.3/SDK v1	v30 .bsp, v11 .mdl
2001	PlayStation 2	Gearbox Software	LOD models	Dreamcast[citation needed]	v40 .bs2, v10 .dol
2002	Gearcraft (007: Nightfire)	Gearbox Software	Direct3D 8 renderer MSAA support	v1.1.0.x/SDK v2.0 (New WON)[citation needed] (For PC)	v42 .bsp, v14 .mdl Console version uses custom in-house engine while PC version uses heavily modified GoldSrc.
2003	Xbox	Ritual Entertainment Turtle Rock Studios	Improved lighting Dynamic iris simulation (HDR-like brightness adjust)	Counter-Strike: Condition Zero engine branch earlier version[citation needed]	v30 .bsp, v11 .mdl, .sxwad format instead of wad
2003	Counter-Strike Neo engine branch	Namco	Heavily modified OpenGL Renderer Native linux support	v1.1.x.x/SDK v2.0 Confirm:only for ver.1 Counter-Strike: Condition Zero engine branch (ver.2)[citation needed]	v30 .bsp, v10 .mdl [confirm]
2003	Day of Defeat	Valve Software	Widescreen resolution support	v1.1.x.x/SDK v2.0	v30 .bsp, v10 .mdl
2003	Steam	Valve Software Turtle Rock Studios Gearbox Software[citation needed] Ritual Entertainment	Detail textures (since 2004) Steamworks (replaces WON) Steam Friends VGUI on Main menu & Console VAC 2.0 (since 2005)	v1.1.x.x/SDK v2.0[confirm]	v30 .bsp, v10 .mdl [confirm] Starting with this version, game files are no longer packaged inside .pak files, and instead either stored directly on filesystem, or stored in .gcf files prior to SteamPipe. This version is compatible with most games/mods built on WON/Retail version (many speedrunners often use 2001 WON client/server.dll on 2005 version of Half-Life). Note:* - Initially at launch, Steam Friends is a instant messaging feature, allowing player to chat with friends, or play minigames (Parlor Games) with friends. Later it was updated in January 2006 with Friends v2 (aka Friends Beta), which removes Parlor Games and relies on newer Steam API. The Friends menu option was later removed around Agugust 2007 as Steam Overlay (released at the same time with the launch of Steam Community) replaced most of it's feature. The first version of Friends no longer works as the old Steam server for this version was offline, while Friends v2 still partially works with latest Steam client, but buggy (message will only shown on Steam client and will not appear in-game).
2013	2013 SteamPipe (SDK 2.4)	Valve Software	Linux and Mac support FBO renderer MSAA (4X) support Removed support for EAX/A3D surround sound and Direct3D 6 renderer Removed support for Quake MDLs (2019).	Steam	v30 .bsp, v10 .mdl GCF has been removed and game files are now placed directly on the filesystem after SteamPipe.
2013	Cry of Fear engine branch	Team Psykskallar	Improved Paranoia's OpenGL Renderer	Steam/ Paranoia HLSDK fork[3]	v30 .bsp, v10 .mdl [confirm] Heavily modified, and based on pre-SteamPipe version.
2016	Svengine	Sven Co-op Team	AngelScript FMOD audio (restores EAX/surround sound features) Extended engine limits	2013 SteamPipe	v30 .bsp, v10 .mdl Significantly modified with extended engine limits and scripting using AngelScript.
2023	25th anniversary, aka HL25 (SDK 2.5)	Valve Software	Increased engine limit Steam Input Shaders Steam Networking High-DPI support for VGUI Widescreen (Hor+) FOV WebM	2013 SteamPipe	v30 .bsp, v10 .mdl Introduced with Half-Life 25th Anniversary Update, fixing various bugs and increased engine limit. The HLSDK was later updated with code introduced with said update.