YAFM when you are hallucinating and would hear one of the “sink on the level” noises: “You have a sinking feeling”, or “You hear something that gives you a sinking feeling”.

Gehennom should have various ambient level sounds, less frequent than special room level sounds since there is more Gehennom area when the player will hear them. They could include screams, wails, tortured cries, sounds of evisceration, and evil chanting (and more).

New shop type “boutique”, which only generates in very small rooms (otherwise it’s converted to a general store) and sells not-very-useful items at highly inflated prices. Also, other sorts of shops that are suitably small and have no useful items in them may be converted to boutiques. They have unique level sounds, such as “You hear a watch ticking” and “You hear someone pouring a cup of coffee”.

Allow “You hear someone counting money” to show up on levels with no vault but which do have a shop.

The “You hear someone cursing shoplifters” message replaces “someone” with the name of a known alive shopkeeper on the level.

Bones levels have a special level sound. Possibly the same “eerie feeling” you get in abandoned temples.

“You hear the splashing of a naiad” may happen if there is a water nymph on the level at all.

Drinking multiple potions of booze in a short time span has progressive effects: first confusion as normal, then vomiting, then sending the drinker to sleep or losing some (resistable) HP via alcohol poisoning. Also add in monster (dwarf, orc, leprechaun) booze-drinking behavior, complete with drinking songs as level sounds when a monster is intoxicated.

A level sound for when there is a dragon somewhere on the level.

Level sounds on every level with a branch stairs. For spoiled players, the main benefit of this is to help locate the stairs to Vlad’s Tower.