I might have a bias because I have a long-running campaign that takes place in a sub-arctic setting, but I loved reading this adventure. Beautiful art and very evocative writing. Particularly loved the Calling Horn and the Game of Champions! Would happily play in or run this adventure.

marvellous Nordic/icy adventure, frostbite table a welcome edition for GM's! main improvement I could suggest is to bring region map more in style with rest of the wonderfully stylised module. This critic does however acknowledge that his own mapping skills leave much to be desired! We ride for the northern reaches! 

Nice work, the text is readable layout nice and clean with some appealing style. Each location and NPC is flavourful and evocative. I Love the mythic slant this has, it really sells the setting and it's edge-of-the-unknown vibe. Great Work!

Interesting setting; these cold mountains remind me of Skyrim scenery.
I think that the large head and the stone face are concepts somehow similar and their locations are very close. I think a regular cave entrance would work just fine, and that reinforces the concept of the insulting head, wich is great.
A suggestion about layout: maybe the map works better at the beginning instead of the end, to give context.

The game within the game happily took me by surprise! And the edge of the world is a really nice detail in an adventure that becomes more magical the more you walk towards it.

I really liked how you framed several parts of the text, pages 3 and 4 are especially excellent. Bodoc, the giant head shouting insults on the top of a hill,  really stuck with me. You did a great job with the brief, italicized description for each of the monsters and locations.

If I ran this, I think I would modify The Game of Champions so that instead of using pieces, the players were shrunk down onto the board and had to fight the other side.

I like the vibe of this as you travel further north the stranger and weirder things get and I like the hook you built in with the game of champions to have players use and find pieces in the world to honorably get the Prince back. 

There are a few things I would suggest. You noted for one of the characters how you would obtain their chess piece. I’d like to know what deal is required with the others? I know we players love our murder hoboing but seems like there is opportunity to say do a small task or quest for the lake lady or help the head on the hill track down Fodoc. Little mini quests to earn the pieces as I suspect most players will not put any weight into the chess pieces so unless they get the one at north winds cave and then hit the right random encounters, slaying those beings, and just picking up the chess pieces by happenstance, they will arrive at the giants hall and turn around to go find pieces in the world before returning. Not that that’s bad but “the holders” of these pieces probably need something to relinquish the pieces in question.

Also while it’s a point crawl I didn’t see any info on distances to determine travel times unless I missed it. With the brutal winter weather knowing your distance of travel will help you determine how much gear you’re packing to get to your next destination and it will make your winter weather system effective in instilling a certain player/PC reverence for the elements.