I played in one campaign where I had to track arrows. It was a homebrewed world where anything outside of cities was extremely dangerous. We found eventually that the reason why was all the good gods had died, as this devouring entity had started eating them and then had gotten trapped, which let evil go unchecked.

It was a lot of fun, my character would have to go out and sneak around to find good wood for arrows and he spent his time during watches crafting more arrows.