Hellboy Movies: Original Timeline
This watch order covers Guillermo del Toro's two Hellboy films, which form a complete duology. The films star Ron Perlman as the wise-cracking demon hero and offer a unique blend of gothic atmosphere, practical creature effects, and emotional depth.
The connected storyline follows Hellboy's adventures with the Bureau for Paranormal Research and Defense, his relationships with Liz Sherman and Abe Sapien, and his struggle with his apocalyptic destiny. Del Toro's films are widely considered the definitive screen versions of the character.
There is 1 other watch order available - see the link up above.

Hellboy
In the final days of World War II, the Nazis attempt to use black magic to aid their dying cause. The Allies raid the camp where the ceremony is taking place, but not before they summon a baby demon who is rescued by Allied forces and dubbed "Hellboy". Sixty years later, Hellboy serves the cause of good rather than evil as an agent in the Bureau of Paranormal Research & Defense, along with Abe Sapien - a merman with psychic powers, and Liz Sherman - a woman with pyrokinesis, protecting America against dark forces.

Hellboy II: The Golden Army
Hellboy, his pyrokinetic girlfriend, Liz, and aquatic empath, Abe Sapien, face their biggest battle when an underworld elven prince plans to reclaim Earth for his magical kindred. Tired of living in the shadow of humans, Prince Nuada tries to awaken an ancient force of killing machines, the all-powerful Golden Army, to clear the way for fantasy creatures to roam free. Only Hellboy can stop the dark prince and prevent humanity's annihilation.
Other Film Series
Avatar
James Cameron's groundbreaking science fiction saga following Jake Sully's journey on the alien world of Pandora across multiple decades.
Ghostbusters
A supernatural comedy franchise about paranormal investigators who capture ghosts in New York City, spanning multiple decades and timelines.
The Mummy Universe
A franchise spanning ancient Egypt to modern times, following adventurers who encounter supernatural forces tied to Egyptian mythology, including the core Brendan Fraser trilogy and various Scorpion King spin-offs.
The Prophecy
A supernatural horror series exploring angelic warfare and humanity's role in the celestial conflict between good and evil.
Underworld
A gothic action series following the centuries-old war between vampires and Lycans (werewolves), centered on vampire Death Dealer Selene.
Warlock
A supernatural horror trilogy featuring different standalone stories about malevolent warlocks, connected more by theme than narrative continuity.