LotR: Realms in Exile is a mod for Crusader Kings III, featuring the world of Middle-earth in Paradox's great grand strategy game.
Helms Deep guards the Gap of Rohan, it is a stronghold of the Riddermark.
"It is said that the Hornburg has never fallen to assault, but now my heart is doubtful. The world changes, and all that once was strong now proves unsure."
Realms Discord:
Discord.gg
Paradox Forums:
Forum.paradoxplaza.com
Amazing to see such structures on the world map!