Let's say that this game is pretty competent in what it wants to do. Looking at steam tags I expected a bit more of horrory shooty pew pew fun but instead got some kind of adventure game that delves into Nordic mythos to tell its story.

Gameplay-wise we run, we jump, we sometimes shoot and we get exploded by every single enemy who manages to touch you like they got a bubonic plague (only highest difficulty). Which actually got silly after I found out that spooky scary spider monsters cant get you if you stand on a railing ten centimeters above ground level. Oh, we also sometimes play dodge the chilling eye-spotlight with giant dudes. Other than that we mainly walk through ventilation shafts and metal corridors soaking that amazing level design.

The setting is pretty cool though. Humanity opened portals to eight other worlds and everything gone to shit because people started looting other worlds and kill its inhabitants because fuck'em, we want that shiny thing they are holding.

Design-wise all living things are pretty good. Skin-flayed husks, chestbursting-spider-demon ridden sinners, biomass doggy are cool. Was that Jormungand worm? Too bad we didn't see more. Level design though is shit. Considering almost all the time we are in the dark, only thing we see is metal corridors of different sizes. Sometimes it's ice corridors. And sometimes it's just pitch black like you fell into someone's asshole. It's just uninspiring and tiring.
Can't say anything about music. It was there, but I remember nothing of it.

Note: I noticed that I forget a lot of stories some time later so I will kind of start retelling the plot from this note on. It will always be in cursive at the end so you can easily skip it. Obviously it will contain spoilers.

So we wake up on an operating table with angry looking light bulb telling us to open boxes and rotate some cubes as an IQ test. After that we get viking vision and start to see in the dark and glyphs. We then go through a lot of maintenance shafts to arrive in Niflheim and die like a bitch we are. But we got saved by a CEO of burp corp who tells us there is an apocalypse going on outside because Yggdrasil is spreading its roots all over the world and we need to find three keys to insert them into an Apsulov tablet to stop it all. During that we find out that the angry light bulb is a "Ghost in the Machine" who appeared after humanity opened the portal to world other than Midgard. We also find out that when we die we travel to Ether where this Ghost resides and then revive. CEO tells us he suspects this Ghost is actually Loki and after inserting last key this confirms, he also suspects that we could be incarnation of Hel, Loki's daughter. Turned out, inserting the keys into the tablet only made things worse and actually freed Loki and opened all doors for nine worlds to merge. Loki then proceeds to kill us and we wake up in Niflheim. But little did he know that we were attending Kratos' school of not dying and just went back into Midgard. We found CEO man lying on the floor in two parts who we then transfer into a magic ball and move on to find something that could kill Loki. We get back into Niflheim, walk the pass and arrive before the corpse of Hel, ruler of the underworld. We then consume her power and reawake Niflheim, which was lying dormant all those eons. And that power could kill Loki. After last boss fight with our father we choose the ending.

Ending 1: we kill Loki and start ruling underworld again preparing for worlds merging.

Ending 2: we side with Loki and he becomes ruler of all worlds. Then we happily travel all around with dad.