How to open multiple local HTML files in Google Chrome at once?

Using Google Chrome Dev Channel on Windows, I have multiple local HTML files in one folder:

And I want to open them all at once in one Google Chrome window as separate tabs:

What I tried and did not succeed:

• Selecting all files in Windows Explorer and dragging them into Chrome (only one file was opened)
• Selecting all files in Windows Explorer and right-clicking then "Open" (a blank new Chrome window opened)
• Selecting all files in Windows Explorer and pressing Enter (a blank new Chrome window opened)
• Using the file open dialog in Chrome (only single selection supported)

So what seemed to be a trivial task to me seems to actually be impossible.

How can I open multiple local HTML files at once in Google Chrome?