Source SDK 2013 Singleplayer

This build of the SOURCE SDK template is what many hl2 mods use to run.

Because It is a free download!

This saves you from needing to buy Half-Life 2. Thanks Volvo.

Click to Install

By default, many sourcemods(including Mapbase, will crash when launched, unless you select the upcoming branch.

To select upcoming branch, follow these instructions:

1. Open Steam, go to Source SDK 2013 Singleplayer, right click Properties
2. A window will open. Go to "Game Versions & Betas", select upcoming beta branch.
3. Steam will automatically re-download the files. Once it's done, try to launch the mod again.