Here are five of my favorite films that seem to be great inspirations for this sword and sorcery retroclone. These are not my official or essential anything , they're five very underrated films that I always seem to come back to over and over again.
Krull is pretty essential in my book for AS&SH game. I've taken a lot of heat for Krull over the years but it remains a constant on many OSR forums I've noticed.
The Lovecraftian Beast, the kingdoms, knights in Italian style armor with swords, The Slayers, did I mention the Slayers, glass giant spiders, weird rites, half forgotten artifacts and more.
Fire and Ice by Ralph Bakshi remains one of my all time favorite Rotoscope fantasies. There is so much that Frazetta and co. packed into this one. This is pretty much what came to mind when I was reading AS&SH.
The action and weirdness abound in this one and its a nasty little gem of a film. Fun for the whole sword and sorcerer crowd.
"Let me show you a trick that Mother showed me when you weren't around." or words to that effect has always stuck in my mind in one of the best 'Wizard's Duels' in an animated movie.
Wizards has a lot going for it. Weird mutants, drug, religion, and political references all couched in fantasy tropes. The movie is way ahead of its time and another Bakshi effort.
The original Beast Master has much of the feel and visual look of Hyperborea in my mind.
The "ziggurat", the proto humanoid races, the weird religions, Rip Torn's cleric from hell, and lots of 80's cheese.
The original Dragon Slayer pretty much covers how I visualize certain ancient kingdoms of Hyperborea, the wizard's reaction to the changing world, the ignorance and weirdness of the various characters in this movie echo certain ideals I see in the game.
This is a fan made trailer and by no means reflects this great movie nor is this list solid reference. Its a quick snap shot of my imaginings of my version of Hyperborea. Take this list for what its worth. Your mileage may vary.