This game will not be canon to the main FNaS storyline. Also, there are some spoilers ahead.
It's gotten much worse since the beginning.
After Minetropolis' bunker got destroyed by a freak storm, the people of the town were forced to evacuate through any means necessary. Your only method of escape is by [SPOILERS].
Congratulations, you've left your nightmare... and entered a new one.
Once again, you must ward off hostile mobs in an attempt to secure yourself until [SPOILERS].
But this time, you must fight to survive.