There is a key in the rafters above the transformers that is hard to get.
Does anyone know what this goes to?
Viewing post in VotV Tutorial secrets
When you first spawn in the tutorial, turn around then interact with the tiles on the wall, on the right side near the top one of the tiles should slide open and reveal a lock, the key is for that. It opens the grate under water in the room with the table/burger/ bookshelf. If you're not sure how to get back to the beginning after getting the key you can ragdoll one time to teleport yourself to the start of the tutorial.