TL;DR
Overall a good game, probably B-tier. I did use the hints mod after seeing reviews about the choices. I completed the game in 2.5 hours and got most of the scenes. You must use the walkthrough mod if you play this!
Good
-Very nice voice acting for all the lines and for every single choice
-Art is good
-Really hot outfits and a decent variety
-The hypnosis corruption is pretty well thought out (the MC is not a complete retard like in some other games)
Bad
-Scenes and text are unskippable, just have to spam spacebar
-Scenes (including dialogue) during the harem end is the same as when you do the invidual endings
-Unsure how to unlock some of the gallery scenes
Full review:
The story is simple, the MC wants to corrupt his whole family during a blizzard and has a few days to do it. I think the MC in this game is a lot smarter than other games with a similar premise. One example that comes to mind is Tamas Awakening which is much worse than Snow Daze. The MC in Snow Daze, whilst is still a shit head, is definitely a bit more clever and actually plans out the corruption, for the most part. I do think the hypnosis is somewhat 'realistic' and it does make the story more believable and therefore more engaging to play.
The characters in this game are decent. I did feel that the girls did have their own personality and were somewhat interesting. It did get a bit weird near the end and felt a lot less realistic but whatever. I have to say the MC in this game is definitely a creep and a bit of an incel which isn't the best, but it was tolerable. The girls were also kinda bitchy but sometimes justifiable (after all MC is a creep). It didnt really affect the game much because we are the ones that are corrupting the girls.
The art and scenes in this game are pretty good. The art especially is really nice and high quality. I do wish there were more CGs or scenes, especially in the bonus room there seemed to be a lot of cut scenes (which were voice acted!), it wouldve been nice to see some more CGs for those. Speaking of voice acting, it's probably the highlight of this game and definitely brought this game up from a solid game to a good game. Another thing I really liked was the variety of outfits and how hot and slutty they were. I do wish the girls kept the slutty outfits on during the sex scenes though. I also don't know why the girls reverted back to their normal clothes at the end of the harem ending, surely they'd be wearing the slutty clothes? The scenes are also easy to obtain using the walkthrough mod since the game is linear. I did see a lot of reviews before I played this game complaining how some choices would just immediately lead to a bad end. It's definitely a weird design choice. However, even though I used the walkthrough, there were still some scenes in the gallery which I didnt unlock (the individual endings with the alt clothes, and the ending where Sarah controls everyone) and I have no idea how to get them. Another issue with the scenes is that the scenes during the harem end (after you do all the individual scenes but before everyone becomes a slave) are identical to the individual ending scenes, including the dialogue. This does just feel a bit lazy and it's even more annoying that these repeated scenes are not skippable.
In terms of lewdity, there's a lot incest and hypnosis (as you'd expect), not much else other than this.
Overall, it's a good game with great art and voice acting, but the ending could've been bettter and I wish there were more scenes. I would still recommend this game, but you must use the walkthrough mod, otherwise it probably won't be as enjoyable.