A World of Pain mod for Fallout: New Vegas

"A World Of Pain" by David LeMaistre aka Dj Mystro
AWOP REQUIRES THE LATEST FNV PATCH to be installed.

Description:
Adds 114 intense locations to the wasteland filled with enemies and loot. They vary from small Gas Stations to huge maze-like sewers and derelict factories. Adds several days of new gameplay possibilities. A massive new linked Underground complex awaits filled with quests, NPCs with dialogue, vendors and some of the toughest enemies you will encounter anywhere in the game. Also adds many modified weapons, armors and items to the game with enhanced stats to help and hinder you throughout.
Everything has been done using vanilla content at this stage so the filsesize should still be tiny. That said everything is complete and navmeshed and there should be no gaps or unfinished interiors.
The final version will not have a name change (I changed my mind about that) so it’s gonna be called a Preview forever.
Note about Loot: This mod adds quite a lot of loot (though much less than older versions). If you don't like finding lots of useful stuff in most AWOP locations then get the Low Loot patches from the patches site.
Also if you are concerned that having about 300 extra NPCs in the wasteland will slow your computer down too much grab the LowNPCs Patch (also on the AWOP Patches Site) which removes all but about 15 AWOP NPCs (from exteriors only and removes no-one important or with dialogue).
AWOP Patches Site:
Newvegasnexus.com

AWOP VERSION 5.0 Overhaul Released!
[NOTE: All PATCHES need updating to match the new AWOP standards. They have all been updated too and trying to run some of the older versions will most likely lead to problems].
-All areas have improved lighting.
I found how to reduce the fog without losing too much darkness and have been systematically altering every location's base light & fog in order to better suit their size, location and shape.

-Old areas revamped.
I have been through each area alphabetically, cluttering each location to the same standard. Many extensions have also been built to smaller or previously less unique areas.

-Tons of loot reduced, altered, moved, hidden and stuffed into locked cabinets.
Instead of 40 5.56mm expect to find clusters of 2-16 rounds in most ammo clusters but look around carefully enough and you should find some more hidden, more reloading supplies or something else to use instead.

-New Notes.
Every listed area has at least one note explaining something about what happened there (thought there are still a few limited exceptions in the Underground and in small houses). Many areas now have several notes (though they can often be hard to find). Finding certain terminal logs will also add specific AWOP Map Markers.

-New Quests.
4 new Quests added:
1: Find Baxter for Sgt Arkus.
2: Help either Legionary Burr or Frost kill the other in Canyon Station.
3: Help a mini-revolution by speaking with Marshal at Cottonwood Bunker.
4: Kill the ghouls east of Novac and find out what happened there for Reed.

-‘M’ Weapon Overhaul:
Significantly increased M Weapon Strength and Skill requirements so they are harder to use at early levels.
-New Music & Ambience settings:
All big areas (and most of the others too) now have appropriate audio settings and music.

-New dialogue.
Find out about local AWOP locations through NPCs such as Rogan and Reed, one new Legion vendor and loads more quest related dialogue.
-Tiered Frankie’s weapon selection to spawn better weapons at higher levels.
-Replaced a load of Static crates in Spring Mount Visitors with more easily movable Empty Sunset Sass Crates.
-New Armors.

-For a full list of new alterations made to AWOP's interiors check out the last part of the FAQ near the end of this page.

A WORLD OF PAIN 4 DEAD MONEY:
Adds several new locations to the Sierra Madre in Dead Money. The new locations are some of the most detailed and unique that I have attempted so far and loot is very scarce. Ammo drops are mostly in bundles of 2-8 rounds and you'll need to use the reloading bench a lot and scavenge from every corner to get through the new encounters.
Also added are several new notes, recipes and healing items.

AWOP 4 Dead Money Updated! (v2)
-2 new interiors (linked)
-Approx 20 new Vendor Codes (for various ammos, drugs, Nuka Colas and other stuff) spread through the new locations.
-A sort of end to the mods original plot.
-A seperate patch for adding DM Vending Machines to AWOP areas.