Authoring Tools/SDK (Portal 2)
The Portal 2 Authoring Tools is a download containing files needed to make mods and Hammer-based maps for Portal 2. The Portal 2 Authoring Tools are available for free on Steam to all owners of the PC version of Portal 2. Note that most Portal 1 level design theory applies to Portal 2 as well. Newer information for Portal 2 may be found at Category:Portal 2 Level Design.
Downloading and Installation
To install the Portal 2 Authoring Tools:
- Open your Steam library (or click here to download)
- In the drop-down menu that says Games by default, check Tools if it isn't already.
- Double-click on the Portal 2 Authoring Tools entry.
The Portal 2 Authoring Tools will download to your computer via Steam. To open the launcher (pictured right), run it from the Steam library or a shortcut.