The worst darkness highly radiated era known to fallout 4. Institute gives you a super power Tesla cell Upgrade the mech radiation suite to travel to The World's End you'll find deadliest radiation ever anywhere in fallout. More monster like giant radiated misquote spider parasite bugs, crabs, centipedes massive dead Enclave body piles & the radiation there reviving some dead soldiers or anything living. In The World's End the institute knows that theres something syrum in a high tec secret facility run by the institute with super advanced computers in the whole fallout world.there it can reverse age, unlimited strength carry unlimited things without being overcoberd. power, stop time without v.a.t.s & going back in time secret super power weapons that use radiation as ammo & armor piercing bullet that go through any thick solid walls objects walls. some 300 feet tall pyramids by some legendary gods 30000 years ago. Bos died retrieving the Artifact too. The artifact will instinly heal the earth again. But at what coast & do aliens even knows about it Outside Earth...3 years after the events of the commenweath the institute & soul survivor travelled to the world's end the where force to work with the institute or else theill bomb evryone as punishment for killing everyone at the institute. They all find a lost dead city, filled with living skeletons twisted by radiation, some zombies, tunnlers, fat bloadted gouls & demons & some undead Enclave soldiers & Slave aliens. They fight there way onthe surface to find the underground tunnel vault to the world's end hidden in the earth neare the core powering the earths core.