I would very much like to consider myself a cosmic horror fan, so the prospect of what Returnal was directly up my alley. There will be spoilers a little later on for the main story and plot, but honestly if you like really tight shooter rogue-lites then I highly recommend you check it out regardless of the story or not.
This game has really fun mechanics and utilizes the whole rogue-like/lite aspect very well and integrates it well into the themes, world, and narrative. This is easily the best part, in addition to all of the lore and slow piecing of elements together to understand what has been happening. If this sounds enjoyable to you, it will be. Check it out.
Now for the spoiler portion, so if you aren't interested in the story or don't care for the spoilers skip this part.
This game had the potential for a really cool, creative, and wonderful story about loss, guilt, acceptance, and grief. However, I think the way they actually went about it made me less appreciative of what the actual game was, and concerns me slightly for the game's spiritual successor, Saros.
As mentioned before, I love cosmic horror and when I am presented with something I like to relish in the cosmic-y horror ideas and themes. This was absolutely how I was feeling with the game until I hit the ending(s). Throughout the game, you are shown scenes within the house that are essentially memories or moments in time that you will re-experience from a certain perspective. This isn't necessarily an issue, with the exception for me that the scenes don't give credibility to the actual possibility that ANY of the stuff in the game is actually happening. The initial ending alludes to Selene escaping the planet, and yet despite this she is forced back into the same loop she was stuck in initially. On a subsequent playthrough with having collected all of the fragments, you get another (true?) ending where you find out that the entire game is essentially replaying the moment of a car crash that killed Selene's daughter.
I don't really have any issue with this again, should the cosmic horror aspects play a role. However, I find myself hesitant to be able to believe that this event was a precursor to Selene journeying out with Helios (the name of her child that was killed in the crash) and crashing on the planet. There just wasn't anything in any of the memories or cutscenes that indicated that it was an actual possibility, mainly due to the modern technology of the world and perhaps music as well.
The game is centered around the Blue Oyster Cult hit, Don't fear the reaper, which is thematically fitting and a clever way to include a song that essentially acts as a guiding motif through the game. While I really like this idea, I don't think it lends credence to the possibility that ANY of the main game actually happened.
More likely, unfortunately, I think (or at the very least felt) that they were going for more of a metaphor and allegory for the cycle of grief and the fact that Selene has yet to accept, process, and move onward from this incident. Whether that means she is hallucinating the entire thing, or ALSO died in the crash and is tormenting herself in the moment of death for the cause of it, but I didn't enjoy that take as much as if it truly had been some more deep cosmic entity that had tapped into her unresolved guilt and grief and forced her in some cycle otherwise.
The game is left intentionally vague so as to not give any concrete answer one way or the other, but try as I might, I cannot come to believe in what I had HOPED it would be. I think that the way it was presented, for those it will connect with, will be very impactful and cathartic, BUT for me it really did not do what I was looking for out of such a deep. lore-rich game.
There is also the possibility I missed things and just got filtered instead, but even after doing outside research and watching video essays and looking up information I just can't seem to enjoy the ending or story with the way it was presented.
OTHERWISE, the game is really fun and has some fun (if limited and repetative) environments, really lending a push for the bullet-hell genre in general as well.
Despite my dislike of the narrative, I will be playing the new game Saros and HOPE that they will give some more clarity to the individual narrative and perhaps to the overarching universe and retroactively make me appreciate Returnal more.