After dropping a clue last week, Koei Tecmo has released a teaser trailer announcing a new "Berserk" video game, based on Kentaro Miura’s long-running dark fantasy manga.

Be warned: The brief teaser isn't safe for work.

Developed by Omega Force, the studio behind the hit "Warriors" series and the new "Attack on Titan" game, "Berserk" is billed as "the most evil 'Musou' in history."

Debuting in 1989, Miura's manga is set in a medieval Europe-inspired fantasy world and centers on protagonist Guts, a lone mercenary with a large sword, and antagonist Griffith, the leader of a mercenary band. “Berserk” was adapted as a television anime series that aired from 1997 to 1998. A new series is set to debut next month in Japan.

As Destructoid notes, the teaser suggests the game will feature "the Eclipse" event from the manga.

The "Berserk" game is set for release on PlayStation 4, PlayStation 3, PlayStation Vita and PC in Japan, North America and Europe. Expect more details to surface this week out of E3 in Los Angeles.