
I think around 15 or 20 is the reccomended level for Old World Blues. The enemies are pretty difficult so its best to go in with a fairly strong character.
I have no idea about Lonesome Road though. I'm guessing it's slightly tougher than Old World though.
(Edited 38 seconds later.)
@previous (dreamworks !AIy/L67q.s)
what the hell dw im trying to help you
the picture is only there for effect