Valve has decided to make its Source SDK free for all users, rather than require at least one Source title be purchased to obtain access to the engine. Valve has confirmed that its Source software ...

Other additions include OS X and Linux support, updates now hosted on github Steam just released the Source SDK for 2013, adding support to Macintosh OS X and Linux, as well as support for Oculus Rift ...

In a surprising but completely welcome bid to further earn our love, Valve has decided to release their full SDK for free. What with TF2 becoming free for everyone for ever and all that, Valve's Robin ...

Following on with Valve’s decision to make their Team Fortress 2 game completely free to all, Valve has this week announced that they are now releasing a Source SDK which will be free to all.

Valve announced today that the Source SDK Tools is now being made available via Steam. The company describes these tools as a precursor to the full Half-Life 2 SDK, which will be released shortly ...

Valve has also issued a general news update: Last week marked the end of the Half-Life 2: Deathmatch level design contest. We received over 200 submissions, and we're going through and playtesting ...