Probably Neverwinter Nights 1 would be best, not for the original campaign (which is supposedly pretty bad), but for the many user-made modules one can download on the net. Haven't played it myself, but maybe someone who has can recommend you some modules.

NWN1 and 2 would be both good choices exactly the reasons morolf stated. Keep in mind that these are 3rd or 3.5th edition though. From what I heard that makes them closer to 5th edition than the 4th one (spits 3 times and throws salt) but probably still quite different from the rules you know.

In case your campaign plays in the Forgotten Realms these as much as the Baldurs Gate and Icewind Dale Series gives you a lot of background story for the world and different regions you could play in; Planescape: Torment a lot to the weirder part of its existing cosmology and higher/lower planes of existence. These are 2nd Editions AD&D ruleset though.

edit: I played the original NWN1 campaign multiple time back when... I was somewhat less old... It has its flaws, even have them be more apparent if having been expecting to a certain standard back then; but its a solid campaign. I loved to use it to level some characters and then continue their journey into various other modules and keep track in their journal of their exploits (and no, it did not bothered me that they where ridiculous overpowered for some of the adventures they ended up doing) :D

Well, the original campaign in Neverwinter Nights isn`t that bad, I enjoyed it. And the ruleset of it is much better and gives more possibillyties (did I write that word wrong) in terms of character developement than the earlier DnD computer games. But if you, for historical research reasons, want to play older DnD games, GoG has to offer many of those old ones bundled in three archives.

https://www.gog.com/game/forgotten_realms_the_archives_collection_one

https://www.gog.com/game/forgotten_realms_the_archives_collection_two

https://www.gog.com/game/forgotten_realms_the_archives_collection_three

Neverwinter Nights might be a good choice. Tons of excellent user-made modules (campaigns) and the ability to roleplay with 3.5 rules on online servers with other players.

Change the "y" to an "i", and you are good to go... :)

Ah, interesting. To me, it looked like having some "i" to much so I put a "y" in between. :-D

Maybe because the singular has a "y" at the end that gets replaced by "ies" in plural. ;) It would be helpful to know what it is you like so much about D&D, and what other videogames you're used to playing, like do you play non-D&D RPGs, do you only play newer games or very old ones, too, etc.

I enjoy both the combat and role-playing aspects of Dungeons and Dragons, though if I had to choose a preference I would say role-playing is the more important part. I am not very tactically minded, but I would love to develop that aspect, so I am willing to be thrown into a hard game that I would need 6 months to learn and eventually beat.

As for computer games, I never really found a go-to genre. I just play anything and everything as long as it is Single Player. Haven't played many RPGs, though I did beat Planescape Torment and loved it.

Just to limit the selection somewhat, let's say I want to play games that are younger than me (so games released after '93).

Neverwinter Nights seems to be the go-to so far, so that's the one I'll tackle first. But please, more suggestions!!

Aw, I would have suggested a game released in '93, lol.

Neverwinter Nights seems a good choice for role-playing, and also because you only have one character to take care of and learn about, since your companions are AI controlled. The best part is the wealth of user made modules, many of them better than the official campaigns. In any case, you get a lot of D&D for your money (3 campaigns + several premium modules + hundreds of free ones)

The other game I would have suggested and that could serve for tactical turn-based lessons, albeit with an even older edtion of D&D (1st or 2nd), is Forgotten Realms Unlimited Adventures (1993), contained in Forgotten Realms: The Archives, Collection Two. Just like Neverwinter Nights, it comes with an editor to create your own adventures with, and just like NWN there are lots of free community modules available for it, including several dozens adaptations of famous classic Pen&Paper modules for D&D. So I'd say this is the second best buy regarding hours of gameplay for money. (Sadly, there are hardly any good gameplay videos out there, but this should give you a first impression, even if the player is painfully slow, taking long pauses in combat, so it's not much fun to watch. In reality the game can be much faster. ;) )

That being said, you seem open and willing to learn enough to play any good D&D game, so you could just as well go for Baldur's Gate 1 & 2, Icewind Dale 1 &2, The Temple of Elemental Evil, Neverwinter Nights 2 etc.

Lol, you can never have too many "i's". The more you have, the better you can see. :D

Eye know!

Lol. :D