Then Daunting Vents

You're basically in an abandon office that went out of biasness a couple days ago. You as the hopefully soon to be owner on this place, needs to tun the power back on. He realizes that  some fuses are missing. You look everywhere but the vents. You go in the vents and get trapped in there. You have to find 4 fuses to get the power back on. You run away from the building but soon you will come back with the intensions of killing all the lurking creatures in that place...