I am writing this review of the completed version of the game. I've played for many, many hours but the game says I'm about 56% of the way in. Though I still have quite a bit more to see my opinion of the game has not changed much since I was 10% of the way in, so I feel comfortable at this point giving my review.
STORY
You play as a guy in his early 20s whose father just passed away. He was something of explorer and pulp adventurer type stock character, and you decide to follow in his footsteps. He leaves you a house in tourist town that turns out to have a dark and mysterious past. You uncover the secrets of the town while looting ruins and seducing the many fine residents of the town, including a doctor, a bar tender, and your "neighbors".
The adventure and mystery side of things gets a little bit too much of a focus for my taste. There are big chunks of the narrative that focus on what mystical shenanigans happened in the past or what the various tomb robbers and criminal organizations are doing in the present that don't do much for the sexy side of the game.
There are a lot of women to be seduced in this game, and they all get quite a bit of attention. The way the game is structured however determines who is seduced when, and the way things play out can be a bit obvious and repetitive after a certain point. The characters themselves vary in how interesting they are, but I found that even the best of them don't focus enough on what makes them unique and different from one another, much less from characters in other stories.
If you like games with player control over the narrative this one isn't for you. There are very few big choices you get to make over the course of the game, with most of the events playing out in a very linear fashion. There are times where depending on where you go and what you do you might see this or that scene first, I didn't reload to check, but this has no bearing on how the story progresses.
GAMEPLAY
What we've got here is a top down adventure game with occasional puzzle elements in RPG Maker. If you've played enough adult RPG Maker games you know how this basically goes. Like some other games it also has some house customization elements and crafting. The house customization unfortunately doesn't lead to many interesting decisions since it's primarily just there as a way to gate off access to optional interactions. If your house is nice enough you can access those interactions, and if it's not then you can't. The specifics of your house don't really matter. Crafting unobtrusive, though after a certain point it does become tedious having to actually stop and pick up every single shiny you see, and choosing crafting copponents from the cluttered and poorly arranged item screen can be annoying.
The game's locations are largely split between those in the town and those in the "dungeon" of the game, the jungle and cave systems. While some portions of the town connect to that or have their own intricate sections most of your time in town you're never more than a couple of screens away from the map, which makes navigation fairly reasonable. I only very rarely found myself having to get deep into exploration to find out where the story wanted me to go next, as you frequently only need to enter the first screen of a location from the map to find out whether or not you're in the right place. That said the dungeon could use more shortcuts, and sometimes navigating it just seems like busywork.
Within the town there is a temple that is full of pushblock puzzles. You get access to these puzzles based on what has happened in the plot and what you've done so far, and I don't like this area's inclusion in general. This segment is disconnected from the rest of the game narratively and the puzzles, while challenging, aren't fun.
My experience was at first excitement, thinking that this game had a lot going for it as a game, but just a few hours in I realized that it was all very surface level and that really it was just more of the same from this developer, albiet with some better map design.
PRESENTATION
So first off we've got what are for sure DAZ or maybe Poser models, and as usual these aren't great. I'll always take shoddy original artwork over these unnerving things. 3D art can be great, but these store bought assets rarely are.
The posing and animation work in the sex seasons is decent, though it's far more shoddy outside of them. Whether it's characters standing around talking, sitting around talking, or action scenes, they never look quite right.
Audio wise things are fine, though it could use more music to vary things up. As it stands you will likely be bored of the game's many tracks by the end, though that will mostly be from tuning them out rather than them becoming annoying.
OVERALL
Treasure of Nadia is adequate. It's a fairly long game with a lot of effort put in, but unfortunately all that effort is towards a mostly linear game full of too much dungeon backtracking, a bog standard pulp adventure plot that thinks we're more invested than we really are, and unappealing store bought 3D models. If the romantic side of the story were more interesting or the dialogue was genuinely funny I could overlook all that, but unfortunately that is not the case.