Installing a font manually is something that I always used to forget how to do since most of the fonts that I installed I got through either yaourt or some other package manager.
Unpack the file and move it to the shared fonts folder
Or if you want to install the font for a single user, move it to the
.fonts directory in the home folder.
You might also have to update
/etc/xorg.conf with the new directory. Search for
FontPath to find the correct location within the file to add your new path.
Now, reload the font cache: