It's an adventure game with a Myst-like interface.
The story wasn't the greatest but interesting enough to keep me playing.
The setting of ancient Egypt was the brightest aspect of the game. The game provides history and game notes in the menus, and after reading it all of the religiousy stuff made more sense. And there were a lot of religiousy stuff. Priests, Gods, Magic, Rituals, Potions, etc. I'm not an Egyptologist, so I don't know how much of it was fictionalized, however, the cities, gods, and historical figures seemed to be real.
The graphics were decent for 2004 and the cutscenes were above average. The voice acting was hit or miss. I thought the female characters' voices were excellent.
The "find stuff" parts of the game was frustrating. I cheated a few times by Googling where item 'x' was located, because I felt stupid wasting so much time traveling from room-to-room while hovering the mouse cursor over every object to see if it was interactive.
Most of the puzzles were on the easy side except for a couple of brain teasers.
The last boss battle was the hardest part. That's because the rules to the mini-game weren't completely explained.
If the above sounds like your cup of tea, wait for a Steam sale. That's how I bought it. At the low price, expectations were low, and the "pleasant surprise" was high.