Oh man the memories. Games are just too complicated these days.

http://en.wikipedia.org/wiki/Crystal_Caves

"On October 24, 2005, 3D Realms (formerly Apogee) released a maintenance patch to fix a bug in the game which set the player's computer's clock backwards 100 years after playing on Windows XP." lol.

PC games are perhaps too complicated, but from what I have seen of my son's gaming tastes, they have simply moved to the tablet and mobile devices.

Secret Agent, anyone? I still love that game. In fact, all the old Apogee games had a sense of mystery and discovery that's sorely missing in modern titles. (Or is it nostalgia?) I remember playing through so many shareware titles and salivating at the new goodies that the nag screen promised from the remaining two episodes!

By the way, Apogee has released a lot of their old titles for free. You can find them at 3drealms.com, in the Downloads section.