Here is the step-by-step process:

If you could provide more details about what Lyndaria is in your context, I could offer more tailored advice.

: Download the verified zip/rar distribution file to a dedicated folder. Right-click and choose Extract All using tools like 7-Zip or WinRAR.

Click "Next" to begin the download. Once finished, Steam will automatically finalize the installation. Installing DLCs and Add-ons Lyndaria offers extra content and expansions.

The massive Lyndaria Digital Artbook does not launch via an in-game interface menu.

. To install this, download the ZIP file, extract it to a folder of your choice, and run the file directly.