hi [@Tenslashsix]! :) 

I am actually thinking of a much more ordinary human race; imagine a world just like ours. The City of No Names is an uncharted place in our very real world and it is owned by no countries for some reason. 

The real humans there have absolutely no special powers so far (and hence making them very vulnerable to urban creatures). The only thing that is different in this universe is the existence of human-hunting creatures that are entirely different and unaware by the human race. They are not a race, just like how we will never clasify zombies as a race. So in effect, there is only one known race in this universe to date.

(Of course you can still have human characters with slightly better hearing or sight as a skill; since it still make sense in a real world setting)