Source 2

Team Fortress: Source 2 project shutters following Valve DMCA takedown request

The developers had already been considering stopping development on the project.

Valve is building a Source 2 Item Workshop for Counter-Strike 2 community map creators

Counter-Strike 2 is being built in Source 2, and its map-making tools will be made available to community creators during the Limited Test.

Could ray-tracing be on the way for Source 2 games like Half-Life: Alyx?

Code from a recent Artifact beta update suggests Valve may be playing around with ray-tracing and RTX rendering in the Source 2 engine.

Source 2 engine driven by focus on user-generated content

Source 2, an engine Valve has confirmed in 2012 and has--in typical Valve fashion--spoken nothing of since. A new Reddit AMA with Valve's Gabe Newell gives us at least some insight into what's happening.

Left 4 Dead 3 listing discovered during Valve tour

The internet jokes that Valve is allergic to the number 3. However, it appears one sequel may finally reach that ever-elusive number. A recent tour of Valve's office by Reddit members has unearthed a listing for "Left 4 Dead 3."