What Games Kick Some Serious Mentals?

[computergamer]

I Always Enjoyed A Game That Comes Along With Great Puzzles Or Challenges Which Most Find Baffling. Myst Has Been One Of My Longtime Collections Now But Quite Frankly I'm Now Getting A Little Bored Of The Series, Is There Any Suggestions As To Games Along The Same Lines..

[oracle128]

Any of the Lucas Arts adventures (google Scumm VM), Alone in the Dark, Flashback (and the sequel Fade to Black), Another World. Don't know if those last two can be obtained anymore, but have a look for them.
Edit: Also, Narbacular Drop