Once it is uninstalled, make sure the folder it was in is also gone, if not, delete it. Go to your fallout folder, which by default is C:\program files(x86)\steam\steamapps\common\Fallout New Vegas - Delete the folder 'fallout new vegas' (In your case, wherever you have the game saved)įind where you installed Nexus mod manager (right click on it, go to properties, it will tell you its location) Uninstall the mod manager, if it asks to delete mods, say yes. Once backed up, Right click on the game and uninstall it in steam, this will get rid of the game (all of the mods will still be there) Use Steam Backup to backup your game, It will only take the core files, it will not touch any modded files. What /u/Titan357 said is mostly correct, but if you do it his way the mods will not uninstall and files will be left over (uninstalling the game in steam does NOT get rid of all mods)