Underground City: The focal point of the mod is The Underground, a city built deep beneath New Vegas.

Scenery Porn: The new world areas tend to be heavily designed with lots of clutter.

However, accessing the main areas from the ones the Redoubts send you to require a high level of Lockpick to Sequence Break, or perhaps feature a Plot Lock. Some lead you into just collapsed ruins, others lead to significant locations like the Hidden Valley Bunker or Vault 21.

Portal Network: The Redoubts, a series of teleports that connect to each other.

Those have been replaced by skill magazines in later versions. +3/+4 to two skills before even having reached Primm).

Nerf: In earlier versions of the mod, Frankie sells a copy of the Medicine skill book, and a copy of the Sneak skill book can be found in the basement of Jean's Sky Diving ( i.e.

Mêlée à Trois: The sewers beneath Primm contain a group of escaped convicts fighting against feral ghouls.

Mauve Shirt: Several new NPCs have names and backstories, but don't have much relevance to anything, they're just here for flavor.

A Homeowner Is You: Several new options for player housing are added, including one to Goodsprings that can be bought for 5,000 caps from Frankie, a new merchant just down the road.

New Legendary variants of monsters exist in the new locations and tend to be much larger.

An early quest from Frankie has you hunting three larger-than-normal Geckos, and then a Giant Radscorpion, to earn a key to the Underground.

Even Evil Has Standards: Jean's Sky Diving now has a basement section populated by a faction of Powder Gangers that were banished from the main gang at the prison for being cannibals.

Fallout 4 a world of pain