Battlefield 1942 - online WWII FPS, like printing money
Dungeon Keeper - a quality fantasy Diablo clone, not a tough sell
Black and White - weak game with mega hype behind it, this is a bad example of a top selling game with an original idea
Savage - this game isn't a #1 seller, I also unfortunately don't think it's done all that well
The point is that very few good, original games do well. Most are rehashes or sequels. But agreed that Ghost Master didn't get much press other than the poorly advertised demo.