Lucida Blackletter font in HD edition

I really disliked the newer font that replaced the font from the original game so I went looking for an answer. Here's what I discovered buried in the comments section in the Steam community discussions page (courtesy of Zetnus):

1. Right click "Age of Empires II: HD Edition" in your Steam library.
2. Click on properties.
3. Click on "Set launch options..."
4. Type in "OLD_SCHOOL" (without quotation marks)
5. Click "Close" and then start the game.

The font should now be back to how it was in the original game.