Nazi Zombie Deadrail
This map captures the feel of custom maps in the old days, where it was just simple, humble maps. It’s a cozy little train station with some detail problems like window boards not being attached to anything and the basement having the same texture for every surface and the outside being cut off too soon so you can see where the world just ends but it’s a nice Nacht replica. Also has a 10/10 2012 rickroll.
It also has a secret invulnerable area but the zombies sometimes won’t enter the building getting stuck behind the window making it a tricky shot. And if you get out of the invulnerable area the zombies take a little to bit to actually be normal, some zombies in the next rounds will still bug out.