In fallout shelter, on android, one of the objectives that may come up is to completely merge four rooms. However, as stated in this question, you can only merge a maximum of three rooms together.

Is this a bug, a typo, or am I missing something entirely?

2 Answers 2


The merge room objective is instructing you to merge 3 rooms together a particular amount of times.

For example, if the objective reads "merge four rooms", it means to merge three rooms, four times.

It does not matter what type of rooms you make, as long as they are merges of three separate rooms.

Also keep in mind that rooms will not merge together if they are different levels. For example, if you upgrade your water treatment plant, it will not merge with a joining water treatment plant, until the second plant is upgraded to the same level.

An example of multiple merged rooms

  • 9
    You don't need to merge a full trio of rooms. In fact, that would give you two merges for the purposes of the quest/mission/objective
    – Dallium
    Aug 16, 2015 at 3:44
  • @Dallium, changed the post to clarify a bit better, but it is asking for a three room merge. I've already personally confirmed that only a three-room merge counts towards completion of this objective.
    – user106385
    Aug 16, 2015 at 3:52
  • 2
    No, you don't. Merging two rooms is fine. I've completed this objective numerous times.
    – Dallium
    Aug 16, 2015 at 3:55
  • @Dallium, then it is a different objective you are thinking of. I have watched the objective lay dormant merging two rooms, and increment on merging the third room.
    – user106385
    Aug 16, 2015 at 3:59
  • No, I'm not. I'll provide screenshots when I reproduce it
    – Dallium
    Aug 16, 2015 at 4:00

Build a Power Plant three rooms wide. Upgrade it all the way. Build a Water Plant three rooms wide. Upgrade it all the way. Build a Diner three rooms wide. Upgrade it all the way. Build a Hospital / Science Lab / Storage Room / Radio Room. Or ANY three rooms that can be merged together. Do that four times. Boom. Objective finished. [Merge Three Rooms; Four Times]

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