The Brotherhood of Steel are arguably the most iconic faction in the Fallout franchise. Donning the famous T-series Power Armor and laser weaponry, they are one of the strongest forces in post-war America, and one of the central factions in Fallout 4. Players will get the opportunity to not only help the Brotherhood on certain missions, but even have the option to join them, ascend their ranks and side with them when it comes to deciding the ultimate fate of the Commonwealth at the main questline's conclusion.