Dungeons and Dragons is the original table top role playing game. While many other games have come and gone, Dungeons and Dragons has maintained its spot at the top of the list. In its early days, though, it wasn’t quite the institution that it is now. Early Dungeons and Dragons was very much a game in which things were figured out as they go. As such, a number of great campaign settings came and went – and were largely lost to time. One of these great campaign settings was Blackmoor, which was with D&D at the very beginning. Though ignored by all but the most hardcore fans now, it’s still a fantastic world to explore today.
Didn’t Ravenloft get pretty much left by the wayside when TSR acquires the rights to Call of Cthulhu, too?
Yeah, they went kinda crazy expanding instead of concentrating on a few good properties. Two editions (D&D and AD&D) probably didn't help them either.
To be fair, AD&D was such a massive step up from D&D that it was for all intents and purposes an entirely different game.