I have been a fan of adventure games since the days of the classic Lucasarts products like
The Dig,
Day of the Tentacle and
Sam and Max Hit the Road. When
Myst came out, I thought it had opened up a new aspect in the adventure genre. Since then, I have seen many companies attempt to reproduce the quality and style that
Myst brought to the PC and they generally failed. One such company is The Adventure Company, and I think they finally got it.
Riddle of the Sphinx 2: The Omega Stone is an adventure game that will keep you absorbed and racking your brain over many puzzles, puzzles that help you discover a link between many ancient monuments.
In the past, Myst-clones have used static and rather stiff graphics to display their surroundings, but The Omega Stone does it right. Instead of just wrapping a blurry, poorly detailed bitmap around you, it appears that they have created a 3D environment and placed you in the middle of it. If this isn't what they've done, then kudos to them, because that's what it feels like.
The music and sound effects generally stay out of the way and in the background, but are set at the right tone and seem to help induce the amount of critical thinking necessary to solve many of the puzzles found in The Omega Stone.