建筑物位于小山丘旁，大体分为上下两部分。绕到山丘上，可以从“大西洋办公室”牌子地下的墙洞进入。建筑内部是一些损坏的终端，The first sub-level has multiple holes to the basement; one is booby-trapped by a pair of laser tripwires. The lowest floor can be accessed in one of two ways: either by falling through the hole in the floor in the eastern room, or by jumping down the elevator shaft and using the hatch on the elevator cart. 建筑内部的敌人有几只尸鬼。
The second floor is accessible by walking up the hill around the building and entering through the hole underneath the "Atlantic Offices" sign. The elevator shaft is accessible here, and there are several holes in the floor that lead to the main level. There is a room with a locked security door here that is controlled from a nearby terminal.
The Atlantic Offices appear only in Fallout 4.