Hellboy character was created by writer and artist Mike Mignola.
The first Hellboy comic book, 'Hellboy: Seed of Destruction', was published by Dark Horse Comics.
The first live-action Hellboy film directed by Guillermo del Toro was released.
The sequel to the 2004 film, Hellboy II: The Golden Army, was released.
A reboot of the Hellboy film series starring David Harbour was released.
The demon prince Azzael summons the infant Hellboy to Earth during World War II, but he is discovered by Allied forces led by Professor Bruttenholm.
Hellboy is raised by Professor Trevor Bruttenholm, who nurtures him to become a force for good despite his demonic origins.
The BPRD is officially organized to investigate and combat supernatural threats, with Hellboy as a key agent.
Hellboy confronts Grigori Rasputin, who serves as a major antagonist seeking to bring about apocalyptic events using dark magic.
Hellboy encounters and fights the Ogdru Jahad, ancient entities whose awakening threatens the world’s survival.
Hellboy's 'Right Hand of Doom' becomes central to his identity and destiny; his struggle with fate intensifies.
Hellboy confronts and defeats the powerful witch Baba Yaga, preventing her from further harming humanity.
Hellboy is killed and later resurrected, deepening his internal conflict regarding his demon heritage and chosen destiny.
In a pivotal moment, Hellboy chooses to defy the destiny imposed by his demonic heritage and fights to protect humanity instead.
