Valve officially announces Source engine 2 at GDC 2015. The Company states that it is available for free to content developers, later this year. The engine includes next generation OpenGL support which is the competitor for Microsoft’s DirectX API in Windows games. This is to ensure that their upcoming Steambox devices, which run on Linux, have a strong API.
With Source 2, our focus is increasing creator productivity. Given how important user generated content is becoming, Source 2 is designed not for just the professional developer, but enabling gamers themselves to participate in the creation and development of their favorite games.