Getting Started with Fallout: New Vegas Modding

Fallout: New Vegas's engine is unstable on modern PCs out of the box. The first hour of New Vegas modding isn't about adding content, it's about making the game stop crashing. This guide walks through the stability stack every New Vegas mod list needs, then the standard mod-manager setup.

If you've modded Fallout 3, almost everything here transfers directly. The engines are essentially the same.

Step 1: Install Mod Organizer 2

Mod Organizer 2 works for New Vegas the same way it does for Skyrim and Oblivion. Create a New Vegas profile pointing at the install directory.

Step 2: Install xNVSE

xNVSE is the modern, actively-maintained fork of NVSE. Use it.

Extract to your New Vegas install directory:

nvse_loader.exe
nvse_*.dll
Data/NVSE/ folder

In MO2, add xNVSE as an executable. Launch through it.

Step 3: The stability stack (do this before content mods)

Three NVSE plugins that make New Vegas playable:

New Vegas Anti Crash (NVAC): patches several common crash conditions.
New Vegas Tick Fix (NVTF): fixes frame-rate-dependent physics issues. Critical on 60+Hz displays.
4GB Patcher: patches the New Vegas executable to enable LAA, allowing up to 4GB RAM use instead of the default 2GB ceiling.

Install all three through MO2. They drop into Data/NVSE/Plugins/ and load automatically.

Step 4: Install JIP LN and Lutana NVSE Plugins

Most modern New Vegas mods depend on one or both:

JIP LN NVSE Plugin: extends NVSE with several hundred additional script functions.
Lutana NVSE Plugin: similar role, often referenced alongside JIP LN.

Install both through MO2. They sit alongside the stability plugins in Data/NVSE/Plugins/.

Step 5: Install the essentials

Yukichigai Unofficial Patch (YUP): community bug fixes. The closest New Vegas has to an "unofficial patch".
The Mod Configuration Menu (MCM): in-game settings framework many mods depend on.
New Vegas Stutter Remover: additional engine optimisation.

Step 6: Run LOOT

Sort and apply. LOOT handles New Vegas like the other Bethesda games.

Step 7: Optional: Tale of Two Wastelands

Tale of Two Wastelands merges Fallout 3 and New Vegas into one game running on New Vegas's engine. If you own both:

Install Fallout 3 and New Vegas through Steam.
Run TTW's installer, it copies and converts Fallout 3 content into your New Vegas install.
Use Mod Organizer 2 with the TTW profile from then on.

TTW is more involved than basic modding but uniquely valuable, Fallout 3's content becomes playable with all of New Vegas's QoL improvements.

Common gotchas

Game crashes within 30 minutes. You skipped the stability stack. Install NVAC + NVTF + 4GB Patcher.
NVSE didn't load. Steam users sometimes need to launch via nvse_loader.exe directly, not Steam's normal launch. MO2's executable shortcut handles this.
"This plugin requires JIP LN NVSE". Install JIP LN.
Plugin limit hit (139 active). Lower than Skyrim's 255. Use FNVEdit to merge compatible plugins.
The frame rate is locked at 60. Use NVTF to unlock it, but watch for animation bugs at very high frame rates, physics tied to frame timing produces edge-case glitches above 60-90 FPS even with NVTF.

The Bethesda Gamebryo modding skillset transfers across Fallout 3, New Vegas, and Skyrim Legacy. If you've modded one, you know 80% of the others. Skyrim Special Edition is the modern variant, see the SSE guide for the post-Special-Edition stack.