Here is a synopsis of the plot of the Wagner opera Götterdämmerung.

There is apparently a "first-person shooter" game called "Götterdämmerung."

Doing a search for the term in summer 2003, I found various uses of the term "Götterdämmerung" to refer to scenarios for the war in Iraq, or to the Arab-Israeli conflict. A review of a series of books on the Confederacy in the American Civil War was also entitled "Götterdämmerung."