Authoring Tools

Portal 2 Authoring Tools

Not to be confused with Workshop Tools (the  Source 2 counterpart).

Authoring Tools are a set of tools that were released with  Source games later on in the engines life. Serving as a replacement for the universal Source SDK.

These include tools such as  Hammer,  Half-Life Model Viewer and  Faceposer.

List of Available Authoring Tools

•  Left 4 Dead Authoring Tools
•  Left 4 Dead 2 Authoring Tools
•  Alien Swarm - SDK (sometimes referred to as Alien Swarm Authoring Tools)
•  Portal 2 Authoring Tools
•  Counter-Strike: Global Offensive Authoring Tools
•  Alien Swarm: Reactive Drop - SDK (Third party)
•  SiN Episodes SDK (Third party)