GoldSrc
GoldSrc (also known as GoldSource) is a 3-D video game engine created by Valve in 1996. It was the driving force behind many famous games of the late 90s, such as 
Half-Life, 
Team Fortress Classic, and 
Counter-Strike. GoldSrc is a heavily modified version of the Quake engine, and runs on C++ programming code. GoldSource and its level editor, the Hammer World Editor, were released by Valve for public use, making it the source of countless community-made modifications. GoldSrc was replaced by its sequel engine, 
Source, in 2004, which currently holds 1st place as the choice for modders. Though GoldSrc is past its prime, many gamers still seek to use it for mods and level design.
For information about converting GoldSrc content to the Source engine, see Porting Goldsource content to Source.
Features
- AI flocking - NPCs can group together, seen with Houndeyes;
- Skeletal animation - allowing for easier animating of models;
- Colored lighting - Quake simply had monotone lighting;
- Scripted sequences - Used extensively to tell Half-Life's story;
- Transparent textures - Glass can now be used in maps;
- Higher poly counts - GoldSrc allows for far more detailed models than Quake.
SDK
The GoldSrc SDK is known as the Half-Life SDK. As of August 2013, it is available on Steam under the "Tools" section. With it comes Hammer 3.4, the 3ds Max sources for many cut and retail NPCs as well as player and weapon models, tools for packing textures into WADs, and detailed documentation on implementing baseline features such as voice chat into a mod.
The full source code for the SDK can be found on Valve's Github Page.
Games using GoldSrc
| Year | Title | Developer(s) | Publisher(s) |
|---|---|---|---|
| 1998 | Half-Life
|
Valve | Sierra Entertainment, Valve (digital) |
| 1999 |  Half-Life: Opposing Force
|
Gearbox, Valve | |
| Team Fortress Classic
|
Valve | Valve, Sierra Entertainment (digital) | |
| Sven Co-op | Sven Co-op team | Sven Co-op team | |
| 2000 | Counter-Strike
|
Valve | Sierra Entertainment |
| Gunman Chronicles | Rewolf Entertainment | Sierra Entertainment | |
 Ricochet
|
Valve | Valve | |
| 2001 |  Deathmatch Classic
| ||
 Half-Life: Blue Shift
|
Gearbox, Valve | Sierra Entertainment, Valve (digital) | |
| Half-Life: Decay | Gearbox | Sierra Entertainment | |
| 2002 | James Bond 007: Nightfire | Eurocom, Gearbox | Electronic Arts |
| 2003 |  Day of Defeat
|
Valve | Activision, Valve (digital) |
| Counter-Strike Neo | Namco | Namco | |
| 2004 |  Counter-Strike: Condition Zero
|
Valve, Ritual Entertainment, Gearbox, Turtle Rock Studios | Sierra Entertainment, Valve (digital) |
| 2008 | Counter-Strike Online | Valve, Nexon | Nexon |
| 2013 | Cry of Fear | Team Psykskallar | Team Psykskallar |
| 2014 | Counter-Strike Nexon: Studio | Valve, Nexon | Nexon |
See also
- GoldSrc on Wikipedia
- GoldSource SteamPipe Directories