I did a thorough search of Program Files, Program Files (x86), and AppData, and couldn't find the program file directory for Civilization IV.
Here's where it gets weird. All of the shortcuts to the game, either the target field is empty, or it leads back to itself. WTF is this? The "show in folder" also only gives me a folder containing the shortcut.
Out of ideas. Guessing the folder is hidden, but I have "view hidden files and folders" enabled.
I explicitly recall installing Civilization IV (from a purchased disc, so it's a legitimate version) in the default install path. I have no idea why it's not showing up in the default install path.
Also the game is running perfectly fine (from any of the shortcuts).
Is there any other way for me to pinpoint the install directory?