Utumno - a twice-abandoned isometric Windows port of the ASCII roguelike game Angband; both surviving versions die with D3D errors on my Win11 laptop
(”Melkor had established a second and lesser fortress at the western end of the Ered Engrin to act as the first line of defence for Utumno from Aman. This became Angband, which was at first held by Sauron. After the destruction of Utumno, Melkor chose to rebuild and fortify Angband as his lair.” -- https://tolkiengateway.net/wiki/Utumno)