The Conan RPG, which I play, is set in Earth's pre-historical past, during the Hyborian Age. And, thus, the game does have its share of black people.
What will become the African continent after a cataclysm that shapes the world into its present state, is almost entirely populated by tribal barbarians of that racial type. In fact, the entire area in the game is called the "Black Kingdoms".
Here is a map of the continent that will become Europe, Africa, and part of Asia--the main gaming area for the game:
You can see clearly the large southern swath of land that is the Black Kingdoms.
Because Conan's universe is based on the real world, all real world racial types are represented. Khitai, to the east, represents the Asians--specifically the proto-Chinese. The Hyborians, who maintain the most adavanced kingdoms in the central continent, are ethnic proto-Europeans.
The Vanir and Aesir to the north are proto-Vikings. Stygians are proto-Egypitans. Turanians are proto-Turks. And so on.
As for as the game line goes, there is a healthy quantity of supplements and adventures, disproportional to many of the regions, that focus on the Black Kingdoms.