Pop of a previous era. Radio stations and marketers that use this are trying to give you a rose-colored, edited, and filtered version of the past. Mr Orwell sez:

He who controls the present controls the past. He who controls the past controls the future.

Having said that... I'm a sucker for "Mystery Achievement", especially if some college radio station plays it while I'm driving. Kewl folks, remember: Type O Negative will be geezer bait someday.