If you bought Reign of Giants from Humble Bundle Store, here is how to download your DLC installer for installing into the Don't Starve standalone game client:
- Visit the Humble Bundle Store, and log in to your Humble Account;
- Navigate to your purchases/owned titles, and visit your Don't Starve: Reign of Giants Humble Store download page, choose your operating system and click on the "Download" button to download your Standalone installer.
Installing Reign of Giants (Standalone) on PC
Once you've downloaded the installer for your Reign of Giants, double-click and install the expansion into the same installation folder as Don't Starve.
Once installed, when you start Don't Starve, you should have the Reign of Giants content accessible whenever you start a new game world.
Installing Reign of Giants (Standalone) on Mac OS
Once you've downloaded the .DMG installer for your Reign of Giants, double-click the .DMG and it should open a new window with the Reign of Giants logo in it. Drag that into your applications folder and it should create a Reign of Giants installer.
For Older Mac OS Versions: Double-click the installer and ensure that it installs Reign of Giants in the same location as your original Don't Starve files.
For Newer Mac OS Versions: Control + Click the app, select "Open" from the dropdown menu, Mac OS will ask you if you would really want to open the file, click "OK".
When you start Don't Starve, you should have the Reign of Giants content accessible whenever you start a new game world.
Installing Reign of Giants (Standalone) on Linux
If you purchased Reign of Giants from Humble Store for your Linux OS, download your version of the Reign of Giants installer (32-bit or 64-bit).
Once the zipped files have been downloaded, extract the contents into the same folder as Don't Starve. When you start Don't Starve, you should have the Reign of Giants content accessible whenever you start a new game world.