The Mass Fusion executive suite is a location in the Commonwealth in 2287.


The Sole Survivor is teleported to the area as part of the Mass Fusion quest. In the Brotherhood of Steel version of the quest (Spoils of War), the player character is dropped off by vertibird.


The suite is comprised of the upper levels of the Mass Fusion building in downtown Boston. A series of rooms with an elevator leading down to the Mass Fusion building. It also has a reactor room.

Notable lootEdit


  • The elevator ID card needed for the Mass Fusion quest does not spawn until the player character begins the quest.
  • By jumping off the top of the building towards the southeast, it is possible to land in Goodneighbor. Instead of continuing to fall, one may arrive at the entrance.
  • As of patch version 1.9, the executive suite cannot be discovered until the quest the Nuclear Option reaches its conclusion.


The Mass Fusion executive suite only appears in Fallout 4.


  • Playstation 4Icon ps4 Xbox OneIcon xboxone If a companion is dismissed while on the roof of the building, they will remain there until retrieved.[verified]
  • PCIcon pc Playstation 4Icon ps4 Xbox OneIcon xboxone Provisioners may become stuck on the roof where they will remain indefinitely. Their supply line remains active, however.[verified]


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