The Source SDK is a software development kit compiled by Valve Corporation that is used to create games or mods for the Source engine. Games like Left 4 Dead, Left 4 Dead 2, Counter Strike: Global Offensive, and Portal 2 are packaged with their own set of 'Authoring Tools' that are tailored for their specific engine builds and come packaged with the game on Steam. These games use most of the same programs below, but the source code can not be dumped. In 2013, an update was released for Source SDK that allowed users to build OS X and Linux versions of their mods. Additionally, support was added for Valve's new Steampipe content distribution system as well as the Oculus Rift. The Source SDK currently has three engine versions. A user can choose the 2006 version of the Source engine, which is only used by Half-Life: Source, Half-Life Deathmatch: Source, and various mods built on old Source 2006 code. All other Source games were updated to the most recent 2009 version of the Source engine.
The statistics above update daily and provide insight into how well articles, files, videos, images and other content you post is affecting the popularity of your mod. If you wish to track these statistics on your homepage, blog, facebook or even in news and forum posts here, use the embed code provided.
Please note: all content linked with your profile including archived downloads, news etc is still being tracked and included on the above graph even if it isn't mentioned.
We recommend you link to your mod profile on your homepage, blog, forum and other communities you are a member of like Facebook and X. To help you do this you can copy and paste any of the share options code provided, or check out our mediakit.