Seems like some of the mountain bases that generate now have hallways and rooms that are hidden until discovered... Think it would be possible to just have the game generate more rooms and hallways with bad guys patrolling inside? Would be a good starting place I guess.
Not sure how robust enemy base generation is, but seems like some modders have been playing with it.
Not sure how robust enemy base generation is, but seems like some modders have been playing with it.