Mole rat swarms ended it for me – Fallout Shelter Review

Was entertaining for awhile, liked the quest system. Got to about 40 dwellers... then got attacked by a mole rat swarm that reproduced way faster than the dwellers could kill them, even with laser weapons. So it turns out that the big piece of info they don't tell you in-game is that the higher your population gets, the nastier the monster attacks are. Don't grow too quickly- if your vault is mostly lightly armed low level folks they will all get slaughtered. Much more entertaining when I knew that.
Review by Frank Sronce on Fallout Shelter.