One of the most memorable experiences of my life.
Aah, The 7th Guest :-) I bought it a few months after we bought a single speed CD-ROM-equipped 386 in 1993. The game cost a fortune (330 shekels - today's equivallent of about $80), and - since I bought it in the middle of a school day - brought a huge amount of attention to the little package.
The game simply blew me away - smooth (not 100% on my single-speed though), beautiful animations, actual video (which was, for the time, a technological breakthrough) and very difficult gameplay. The music was so dramatic and enveloping I still listen to the CD soundtrack to this day.
Some of the puzzles are just damn difficult, most mention-worthy is the microscope puzzle in the basement which is just DIFFICULT. I did finish the game eventually, and I still find it an awesome experience at 1am with the lights out and volume cranked up...
Also, I have to agree with Jim - the actors are rather terrible.
The Bottom Line
A wonderful experience you will never forget.