The Nightmare Mode Title update for Nordic Ashes: Survivors of Ragnarok has 5 achievements.
Conquer Helheim with Hansi in Expert mode.
Conquer Svartalfheim with Hansi in Hard mode or higher.
Conquer Vanaheim with Hansi in Hard mode or higher.
Conquer Jotunheim with Hansi in Hard mode or higher.
Conquer Alfheim with Hansi in Hard mode or higher.