KEEP these at least
Sid Meier's Civilization® III Complete
Space Pirates and Zombies(SPAZ)
PixelJunk Eden
Broken Sword II: The Smoking Mirror
Broken Sword: Director's Cut
I second pretty much all of these (besides SPAZ which I've never played). As far as Civilization goes though, III was a great game back in the day, but I don't know how well it would hold up these days compared to IV and V, which are better games IMO.
Definitely get the two Broken Sword games. Some of the best point 'n' click adventure games I've ever played.