This is a world-buildng tool that generates names for historical periods in your timeline. It's only a name generator, not a mini-game for generating histories. There are no details: no dates, no durations, no causes, no impacts, no heroes or villains, etc. It simply gives you an era name and then it's up to you to figure out what it means.

It's system-neutral and largely genre-neutral too. You could have the "Regime of Sorrow" or the "Epoch of Nightmares" or the "Week of the Exalted" in your history whether you're doing fantasy, science fiction, or some other genre.

If your setting already has a history laid out with era names and other details, you probably wouldn't have a use for this.

You get a d100 table that chooses the era type (such as Regime, Epoch, or Week as shown above) and two d100 tables for filling in subjects (such as Sorrow, Nightmares, or Exalted).