I think the OP's comments reflect well on him for having the concern, but he should look at the context.
If it's a legitimate 'set in Africa' game, no problem.
Of course it's possible for some hate group to use that as a cover for any kind of hate crap (kill all kinds of black people! Oh it's set in Africa nudge nudge wink wink).
Followed by expansions for 'African Genocide' rape and chldren killiing, and the 'set in the early 20th century lynching' expansion. Hey, it's not the game, it's set in that time period.
Finally, while a legitimate 'set in Africa' game is no problem, it's perfectly ok for someone to not be comfortable with it anyway and choose not to play it. I don't play every game.
The right to put out things doesn't mean they all have to be acceptable to everyone for their entertainmet. I defend idiots' rights to write a book denying the holocaust - and my right to not read it.
In World of Warcraft, ther are quests I won't do because I don't like the ethics of them - things having nothing to do with a RL issue like racism.
For example, a ghost woman wants you to go kill the wife and kids of the guy who killed her husband. Sorry. People can play how they like on this.