Valve has announced that the latest release of their Source Engine SDK has been released and that it now includes full support for the Oculud Rift Virtual Reality head mounted display.

Valve doesn't mess around when it comes to mods! With more than a week before Half-Life 2 hits stores, they've already released the software developer kit (well, the start of it at least): Valve ...

Source SDK to be made free for all. 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.

Today Valve's Source Software Development Kit (SDK) was updated with the tools to create content for the games in The Orange Box. That means it is now possible to build new levels for Team ...

Valve has confirmed that the Software Development Kit for its Source engine will be made available to the mod community when Half-Life 2 goes on sale, on November 16th.. Eagle-eyed observers ...

Valve's Source engine software development kit today received an update, bringing the package up to speed for Orange Box modding. The release unlocks content and adds tools that will allow users ...

How best to describe Underhell, a mod (a game, really) for the Source Engine? Well, it’s a tactical squad-based hostage-rescue shooter, a supernatural and psychological survival-horror thriller ...

The Source engine powers a number of titles like Vampire the Masquerade: Bloodlines, but it is utilized most notably by Valve properties such as Portal, Team Fortress 2, Left 4 Dead and Half-life 2.

Other updates to the Source SDK include 64-bit binary support, a scalable HUD/UI and other fixes for all other multiplayer Source engine games, including Counter-Strike: Source, Day of Defeat ...

Valve’s Source SDK engine which powers some of the most popular games on the internet, including Counter-Strike: Global Offensive, Team Fortress 2, Portal 2, and Left 4 Dead 2, and many of those ...