During the question and answer session on Reddit forum, he was asked if there is a chance for a new project set in the universe of Half-Life and Portal. Gabe decided to speak on the answering brief “Yes” (Half-Life 3 confirmed!). He also confirmed that Valve is working on a full-fledged single-player games. He revealed that the company in their production uses the Source engine 2, and also works on projects designed for virtual reality. Details, of course, did not.