It is spectacular for this genre to be a patient of psychiatry. And only such people can hear voices from outside. This voice constantly repeats one truth. Everybody Must Die. Due to circumstances, your mentally unstable character cannot disobey.
Otherwise, he will be pursued. Who? His own nightmares. From which he cannot hide. Control the main character so that he can open each door. You need to check each slot for the presence of the necessary items. You need to find a weapon.
After all, you will not go to destroy everyone with your bare hands? Something will appeal to you. Figure out how to use this or that item to complete the mission. A simulator that will knock the ground out from under your feet. Just be careful not to go crazy yourself. Incredible story, from which the blood runs cold. Be careful not to get caught in the eyes of the orderlies.