Make it about survival. In Bethesda’s hands, the Wasteland is fun. By the middle of a run through you’re clobbering Deathclaws with concrete capped rebars and sipping irradiated water without a care in the world. Possibly with a pinkie out. The point being is that the notion of survival becomes obsolete in a world dripped in caps to find, traders to sell to, and junk to collect. New Vegas has hardcore mode, forcing you to think about food, water, and rest, as well as altering the way meds and stimpaks work, but it’s still a world that can easily and comfortably be lived in. It needn’t be the main difficulty level, but the option to make the world a harsh place to live, to make the players think about every move, not just their weapon and perk choices, would give the ashy flavour of survival.