Velmont Castle: Blood and Desire

A cousin follows the main character through a medieval fantasy setting that's still mostly scaffolding right now, with voiced NPCs standing in for a world that hasn't finished building itself. The castle itself is still under construction, literally, and the game says so upfront rather than pretending otherwise.

There's no plot to speak of yet, just a setup: a protagonist, a companion, and a place that will eventually hold whatever this game is building toward. Adult content with NPCs is promised for later updates but isn't in this version, so what you get now is exploration and setup rather than payoff. Treat it as a foundation being poured in front of you, not a finished house.