We found 3 fonts on https://doom.bethesda.net/en-US/the-dark-ages

CachedRecheck
p
button
3 Styles

Open Sans

a
li
ul
button
div
p
span
10 Styles

Montserrat

a
h2
h1
h3
h4
7 Styles

Cantoria Mt Pro

Designed by Ron Carpenter, Monotype Imaging Inc.

FontofWeb by Simdi Jinkins & Onyemsobi