The scenery in Curse of Atlantis is beautiful and full of detail, although it is completely static. It gives the impression that you are merely walking through a bitmap. Thorgal, and the characters you encounter while traveling, are pretty much the only things moving in the scenes. While this does allow you to focus on the main events of the game, it is a little eerie to travel through a dense and dark forest and not see some form of life or movement in the background.
There are also several cut scenes in the game that are done very well and show a lot of the detail of Thorgal's world.
The music is perfect for the game. When the time comes for one of Thorgal's Quest's action events, the music picks up and gets you ready to take out the enemy in whatever way you can, whether it is making him run off the side of a building or firing an arrow to drop some object on his head. The voices and sound effects are pretty good as well, and as a plus, the game has a subtitle option.