It looks like Valve is preparing to roll out Source 2 support for Dota 2

One of Valve’s most popular games may be about to get support for the next generation of the publisher’s game-making engine.

Valve is prepping an update for its Dota 2 multiplayer online arena battler that will include Source 2 content for Windows, Linux, and Mac, according to the website SteamDB. Source 2 is the next-gen version of the toolset that Valve coded and used to make games like Half-Life 2, Portal, and more. The company plans to release Source 2 for free to third-party developers.