Just had a poke about in the BMS.fgd file and to my astonishment I came across a line that mentions a npc rat
@NPCClass base(BaseNPC) studio(“models/fauna/rat.mdl”) = npc_rat : “Rat” []
This would have been great when crawling through vents… Residue processing springs to mind because of all the brown water.
I hope this npc would not be any danger to the player but I think this could have been quite good to have some rats in the game