You will have to survive 5 nights at an underground....place.
And you have stay alive with the 10 Creatures you will play with (not animatronics).
You have to make sure not to make a sound in your office and make sure your not getting too hot cause its "Underground" and you need oxygen and some cooling.
Some ads on your monitor will play to ruin your chances of surviving and you have to do tasks just like in fnaf : pizzaria simulator.
All 10...Shadowy Creatures...Will be shown time to time.