Baldurs gate 3

Incredible game AND - this is very very important ! - it doesn’t need fixing with mods, patches, retexturing etc…

Morrowind, Fallout : New Vegas, Oblivion

All need, fixing, rebalancing, graphics enhancements etc…

Regarding Fable, get the original first (fable anniversary on steam). Since you’re big on JRPGs, you might want to check out Ys, Trails and FATE series. You will definitely want to check out Metaphor ReFantazio

You can also experiment some of the “only on PC” or “best on PC” games like Cities Skylines or Planet Coaster (try the 1st game for both) - neither has an available demo, but will definitely run on your computer. Wait for a sale, shouldn’t take too long. Factorio, on the other hand, has a demo that lets you experiment and get a good feel of what to expect of the rest of the game. If you’d like something comparatively simpler and better looking, try Satisfactory instead (no demo)

On the RTS front, you can actually play the first Starcraft 2 campaign for free, though you need Battle.Net instead of Steam. That game can be a good introduction to the genre and, if you enjoy it, I can point out some other games in the same vein.

A personal recommendation of mine is Palworld. I like the gameplay loop.

Also, please learn to use commas.

Catherine Full Body Alan Wake Ni no Kuni2 The forgotten city Until dawn A plague tale 1 innocence TLOU1 Uncharted

Don’t know the specs or if you’ve played it on console already, but given you played and liked Control and Alan Wake I think Alan Wake 2 is a must-play. It is a very demanding game, though. But would otherwise tick all your boxes.

Dragon Age: Origins is an old 3rd person RPG classic, and I would argue it is best on PC since you can install a couple of mods that fix bugs and restore cut content. And the UI and gameplay is better on PC I’d say. But given you gave up on Mass Effect I’m slightly hesitant.

The Witcher 3 has already been mentioned but it too would be a good shout.

Steam has lots of sales so be patient. steamdb.info Is a useful website to track sales and see if they’re historic lows, also lots of other ways to sort through what’s available on Steam.

Everyone is recommending games, but you haven’t told us a thing about this gifted PC. It’s important to know that prior to recommending anything, as a “custom gaming PC” could be an i7-4790k system from a decade ago.

What are the specs?

The Witcher 3? That is probably the high water mark here.

Also see the new Stalker if you want open world vibes (fps tho).

Maybe Elex?

Not an RPG but has a lot of lore and a form of exploration: Talos Principle 1 & 2.

Hands down the best puzzle games I’ve ever played.

Outer wilds. Dark souls. Remnant? Those are my top 3 (if you can count the dark soul series as one).

my favorite are 3rd person rpg with exploration as an important element in learning about the lore/story

Not PC exclusive, but if you haven’t played Baldur’s Gate 3 yet, it might be something you would enjoy. It’s literally Dungeons & Dragons, and it’s not going to guide you through every little piece of content. You can miss something on one playthrough and discover it completely by chance on your next one.

Sekiro: Shadows Die Twice was life-changing for me. There’s quite a bit of exploration that will let you experience various bits of deeper lore, including an entire hidden story that links up with the backstory of one of the minibosses. Not sure if that’s what you’re looking for, but I really enjoyed this one.

There are entire genres that only work with mouse/keyboard, and thus only really exist on PC. Notably 4X, RTS, base-building, and simulation games. They are where I would start:

• 4X: Civilization VI and Stellaris
• RTS: (Someone else will have to recommend some, they aren’t my jam, but they are absolutely worth checking out now that you have a PC)
• Base Building: Oxygen Not Included, Factorio, and Surviving Mars
• Simulation: Kerbal Space Program and DCS (You will want a joystick for DCS)
• Other: FTL and Hearts of Iron IV

Also, make sure to check out Is There Any Deal to give you historical (and current) best prices on games. PC games go on deep discounts on the regular. You do not need to buy PC games at full price if they were released more than 6 months ago.