This is inspired by "Maze Runner", of which the movie is pretty porely made compared to the book. What if during the night, gates to the spawn area closed up? Machinery outside the spawn would still function, but behomoth biters would roam the halls, and will probably kill you. The only safe area is the spawn.

Given that standard biter mechanics don't cope too well with the maze, I'll be certain to keep the idea in mind, especially of night time spawning (a bit like Scary Nights mod). Once 0.17 hits, there will be a lot more control over AI units, and I'll experiment.