I finished the original Lemmings game, but found the others just a rehash and never got interested enough in them to finish them.

The hardest game I ever played was one of those Myst-like games. It was awhile back and I will be darned if I can remember it. I gave it away to someone when they said they never had problems finishing a game. I finished most of the Myst games in less than 15 hours playing time and I ran thru the URU game in 10 hours of play, but this game was not logical and you had to be versed in binary algorythms to solve some of the more obscure puzzles :) hehe If I remember the darn name I will warn you away from it.