Fallout New Vegas factions and endings: NCR, Legion, House or Yes Man
Compare the four broad New Vegas main-quest paths and prepare before the final battle at Hoover Dam.
Original 2010 Fallout: New Vegas PC base game with official patches. The base-game level cap is 30. Story add-ons, Courier’s Stash, Gun Runners’ Arsenal and mods are outside this guide; their items and increased level caps are not assumed.
The four main routes
The central political paths support the NCR, Caesar’s Legion, Mr. House or an independent New Vegas through Yes Man. These are broad campaign routes, not four buttons available at the beginning. The opening search for Benny brings you into contact with them. You can meet several powers before settling on one, but later assignments can close competing paths.
Watch reputation and explicit warnings
Faction reputation records how a group views the Courier and is separate from karma. Quest actions, killings and certain disguises affect reactions. The game issues warnings when progress threatens cooperation with another major faction; read those entries instead of advancing every available objective automatically. A companion’s loyalties can also make a political choice more costly than the quest reward suggests.
Resolve side stories before the finale
Your treatment of smaller factions, settlements and companions affects the ending slides. Complete the stories you care about before beginning the final sequence, and keep a separate manual save when the game warns about the point of no return. The original base game does not provide ordinary free-roam continuation after the ending, so unfinished exploration requires returning to an earlier save.
Prepare for Hoover Dam
Bring repaired weapons, suitable ammunition, healing and a plan for your current companion. Dialogue skills can alter important late confrontations, so combat is not the only preparation that matters. The exact route and allies depend on your allegiance. This overview deliberately leaves the final resolutions open, allowing you to choose a faction without reading every ending outcome in advance.
Keep the pre-finale save permanently if you want to revisit the Mojave or compare another ending later.
Picture details
Game artwork belongs to its respective rights holders.