The 2002 RPG Neverwinter Nights is a masterclass in game design. Now 23 years old, the community behind Neverwinter Nights has kept the game alive and active all this time — and it has been given a new, unofficial update "by unpaid software engineers from the NWN community." This patch includes several quality-of-life improvements, graphical fixes, and performance boosts to keep the game running smoothly on modern hardware. For reference, roughly a year after Neverwinter Nights, BioWare released the cult-classic Knights of the Old Republic. BioWare was at the height of its prowess with regard to storytelling and gameplay.
Despite the game's age, it still has a long-standing community of fans and creators that give Neverwinter Nights nearly unlimited replayability. In addition to The Wailing Death campaign that comes with the original release of the game, Neverwinter Nights also has two other campaigns: Horde of the Underdark and Shadows of the Undrentide. If none of those tickle your fancy, then the fan-made campaigns might be the place to look. Think about it like a homebrew DnD campaign, except that it's all programmed for you to play through at your leisure. There are dozens of fan-made campaigns to choose from, many of which are on-par with original Wizards of the Coast content in terms of quality.
