This game is a great sequel for Riddle of the Sphinx, in which you now search for the secret of the Omega Stone.
Graphics are just as good as in the Riddle of the Sphinx. This time, providing much more 360 view than in the last game. The monuments, the cutscenes and the different places you can see are represented almost as if you are really there, and just a hand away.
Gameplay is exactly like ROTS (Riddle of the Sphinx), except for the "fast-inventory" mode, in other words, if you right-click, you have the inventory.
Music and sound are amazing. Period.
Finally, to conclude, for anyone searching for a solid archaeological mystery game, Omega Ston is for you.