The modern world you now inhabit is very dangerous. It has many things that may attack you, such as: mirlurks, death claws, raiders, feral ghouls, mutated bugs, and super mutants. There are three opposing factions. The Brotherhood, who wants to kill all the enemies to protect the people. The Institute, a secret institution that spies on people and makes synths. The Railroad, an organization working against the Institute to free the synths. You also have to be mindful of radiation poisoning. 