Source 2 gold: Source 2 — Valve Developer Community

Source 2 — Valve Developer Community

Quake ▶ GoldSrc ▶ Source ▶ Source 2

Todo: This page is not a stub but could use some more detail.

Source 2 is a 3D video game engine in development by Valve as a successor to Source.
It is used in Dota 2, SteamVR Home, Half-Life: Alyx, S&box, and more. Elements of Source 2 are present in Counter-Strike: Global Offensive, such as Panorama UI.

Source 2 was first made public with the Dota 2 Workshop Tools Alpha in August 6th 2014 and formally announced by Valve in March of 2015 at the Game Developers Conference. It was then implemented into Dota 2 on June 17th 2015.
Valve has announced that Source 2 will be released to the public for free, and it will only take money should it be used for commercial products.

The engine is capable of rendering highly complex and well detailed scenes with minimal framerate drops, thanks to its new 64-bit support alongside Vulkan, allowing for better multi-core rendering and more efficient 3D rendering.

Support for 32-bit, OpenGL, DirectX 9, XAudio, and macOS versions below 10.14 were removed in 2021.


  • 1 Features
  • 2 Products using Source 2
    • 2.1 Valve
    • 2.2 Third-Party
  • 3 Tools
  • 4 See Also


  • Integrated asset management via the Asset System.
  • New engine-integrated authoring tools, rebuilt from the ground up.
  • Completely rebuilt Hammer level editor, featuring modern polygon mesh editing tools.
  • Support for both forward and deferred rendering pipelines.
  • Lower latency and more responsive input.
  • Improved audio and voice processing.
  • New in-house physics engine, Rubikon. Includes support for Cloth Simulation.
  • Physically based rendering support.
  • Support for the Steam Audio sound system.
  • Enhanced Panorama GUI, designed to be more user friendly.
  • Native DirectX 11® and Vulkan® support.
  • 64-bit only

Products using Source 2


Products made by Valve.

  • 2015 Dota 2
  • 2016 SteamVR Performance Test – Non-interactive version of the Robot Repair demo
  • 2016 Robot Repair – Included in The Lab
  • 2016 Destinations – Replaced by SteamVR Home
  • 2017 SteamVR Home
  • 2018 Artifact – The Dota Card Game
  • 2019 Dota Underlords
  • 2020 Half-Life: Alyx
  • 2022 Aperture Desk Job


Products made by third-party companies and mod teams.

  • NA S&box


  • Dota 2 Workshop Tools
  • SteamVR Workshop Tools
  • Half-Life: Alyx Workshop Tools
  • Source 2 General Discoveries

See Also

  • Source 2 on Wikipedia

How to Create Your 3D Game in Source Engine

Table of Contents:

Source Engine History

You may have heard of Valve. The Orange Box, Half-Life 2 Episode One and Episode 2, Left 4 Dead, and Portal. All of these are not only fantastic games but influential pieces of media that have shaped gaming.

Initially starting as the GoldSrc engine with the first Half-Life game, Source and Source 2 have come a long way.

Valve’s Source engine has roots in other engines. At the same time, you may see unique aspects and features in Valve’s engine, John Carmack’s Quake engine.

Launched in June 2004, Valve’s Source engine gave players and developers new, exciting tools and games to work with.

Source Engine Tools and Resources

So, you want to make your own 3D games, animations, and objects in the Source engine? Good, because it’s a great option to choose.

There are a few things to consider, like what game you want to create. Let’s look at some useful Source engine resources to help you along.

Source SDK Tutorial – First Map tutorial using Hammer