It's night 35 and I'm fighting the horde. they are coming in from the east and im having a blast watching them step on my land mines and shooting exploding bolts into their midst. it's winding down with an occasional stragler coming in when the wife says" come on. you promised me sushi" so I figure well it's about over i'll just jump off and finish up later and then start cleanup. so go out for a few hours come home and get back on expecting maybe a few more crawlers to come in and then be done. Nope. a whole new horde shows up out of the northwest fight this one into the early morning. run out of bolts, shotgun ammo, and almost all 9mm ammo. so question did I fight 2 hordes (sure felt like it) or do they come in in waves like that from different directions as you get further in the game? up until that night they have all come from 1 direction.