Anything that alters the game's timescale. Most major overhauls to NV, like DUST and AWN, will completely break the game due to leveled list changes and/or deleted forms. Classic Fallout Weapons FO3, & Classic Fallout Weapons - New Vegas, completely incompatible, breaks leveled lists in both games, broken meshes. Incompatible with the mesh and animation fixes in TTW, irons sights, reloads for Fallout 3 weapons and other things will not work correctly. Animation Replacers like Weapon Animation Replacer WAR, Hitman's 1st Person Weapon Animation Overhaul, Asurah Reanimation Pack, completely incompatible at this time, we expect Asurah's to get a patch in the future. More Perks, redundant Fallout 3 perks and generally incompatible and buggy. Weapons of the New Millenia, patch in progress, iron sights are off due to animation fixes and leveled lists need rebuilt. New Vegas Uncut - Freeside Open, and any other mod that makes changes to the Freeside worldspace will require a patch. Fallout Who Vegas - Complete, breaks dialogue and more. FCO Fallout Character Overhaul, all versions are known to conflict and break TTW, do not install. Killable Children, or any similar mods Incompatible. Clear Cache Hotkey, it will break your game. Zan Autopurge Crash Protector, it will break your game.Purge Cell Buffers, it will break your game.
HeroInZero's Weapon Fixes, script and fix conflicts (not necessary). Unofficial Patch Plus, script and fix conflicts (not necessary). Unofficial Patch NVSE, script and fix conflicts (not necessary). Weapon Mesh Improvement Mod, fix conflicts, included with TTW and more up to date (not necessary). TTW itself fixes bugs in Fallout 3 and New Vegas as well. TTW comes with YUPTTW which patches almost all bugs and will continue to do so. Yukichigai Unofficial Patch YUP, and other unofficial patch mods. After War Nevada, completely incompatible. FOOK New Vegas, completely incompatible. DUST Survival simulator, completely incompatible. XFO, This mod is ancient and not even compatible with the current version of Vanilla New Vegas. MMUE Mission Mojave Ultimate Edition, Deletes records TTW needs and reuses Fallout 3 records. NVEC New Vegas Enhanced Content, uses many unused records in FNV for it's own stuff, we use the same records because they're FO3 records.
Project Nevada, Anything but the core module is incompatible with 3.2+, that means Equipment, Rebalance and Cyberware are not compatible, Rebalance and Cyberware can be patched but Rebalance needs AI changing removed, Equipment can not be patched and is largely redundant with Fallout 3.