Well, off those three alone SOMA >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> Observer > Layers Of Fear. Those two are, while not an obvious cash-in like a bit too many horror games nowadays, they are still mediocre at best. I wouldn't come with the idea of Bioshock in mind for SOMA, though. L.A. Noire, you do you, and haven't seen anything abourt RUINER beyond the slick art style.
I assume that you have SOMA already or would get it for your XboX but it's 85% off on Steam.
http://store.steampowered.com/app/282140. Layers Of Fart was given away for free a week ago, too.
I assume that your taste is mostly about narrative games with the ocassional relatively simple arcade, so let me throw some of my favourites and try to fit them there.
The Long Dark - It's currently on the Humble Monthly
https://www.humblebundle.com/monthly (you can subsribe and then write yourself off and keep the games).
Simply put, it's survival at its purest. It's you, your puny human needs, the pseudo post apocalyptic canadian wilderness and nature. No zombies, no base building, no loot that isn't a resource dor your future in that lonely wasteland. If a free roam experience with no goal beyond trying to see the most of the world you can before your demise, mow there's a story campaign that does its parts as a pretty good introduction as it turns off the permadeath in exchange for a save system that has you on a more guided experience. The story itself isn't really as good as it was made out to be but who knows, it's still great value. It's not incresibly gorgeous by itself, but its watercolor style and context can make a sunrise the most beautiful moment you might have experienced in gaming.
Enderal: The Shards Of Order -
Probably my favourite mod of all time. Wait, no, calling it a mod is a disservice. It's a game, by all rights and merits. Like Skyrim? I think you owe it to yourself to get this treat. Only OG 2011 PC Skyrim is needed. Sure, it's not perfect, but it's a fantastic experience. A whole new handcrafted world to explore. An original setting with a, while fairly amateur, nicely presented story. If you aren't quite sold you can check out some gameplay to get the first impressions. It's also more of a modpack, it's not just rearanged Skyrim by any means.
Dark Souls franchise - Most of what could have been said has been already. Next! (DS2 and DS3 are for cheap now)
Gods Will be Watching and
Darkside Detective - A couple of pretty fantastic little indie graphic adventures. One's a harder, grim sci fi story with surprisingly complicated puzzles (there's a different one for each "act") which you have some settings to decide how you want to have them (Simple, Harder, non RNG reliant). In the other hand Darkside Detective is a pretty campy and funny little game you'll beat in a sitting or two.
Hollow Knight and
Momodora: Reverie Under The Moonlight - Metroidvanias! Probably the biggest bang per buck of this list, and that's considering that one's free! Both are gorgeous to see and hear, and while the latter takes a more Castlevania-y approach with a quite short play time expectancy, the former is a bit more on the longer side. Perfect? No, but it doesn't mean it's on my top three games of the year and for 15 and 10 measely bucks respectively, it feels wrong to even critizise them.
Risk Of Rain,
FTL: Faster Than Light and
Nuclear Throne - Roguelikes! There's a lot I'd say about them, but firstly; they are very different from one another as well as from the norm. Risk Of Rain is a strangely soothing alien genocide simulator, FTL is a one of a kind actually good Star Trek simulator able to drive you close to madness, and Nuclear Throne is an actually challenging and hectic twin stick shooter (looking at you, The Binding of Isaac and Enter The Gungeon).
Tales From The Borderlands - The only game with the telltale phiolosphy I cam earnestly call something beyond an interactuve cutscene; a good one! Even the most stern haters of the series can enjoy it. If you like the series it's quite a must.
Of course, there are many more games that deserve to be here but I don't have infinite time, either! Those were some off the top of my head.
