It is a mod for Kingdom Come: Deliverance. This mod replaces Textures to allow you to transform Henry into a knight of the Temple.

In the game, the foundation of the battlefield was the knight. The cavalry's equivalency was the knight. A small group of armored knights was incredibly strong, adept in battle, and capable of defeating a sizable army of foot warriors. Only a man whose father and grandfather had both served as knights was eligible to become one, and the punishment was severe if he was found to have lied about his ancestry.

To install the mod:

The first step is by downloading the file.
Next is to navigate to your Kingdom Come: Deliverance game folder.
Then go to the ''Mods'' Folder.
Finally, extract the zip file into your Mods folder.