Months ago i got to night 167 without using any items, i just ran around the zombies until the night ends. Thats until the game summoned four giant spearton zombies and alot of pouncer deads, keep in mind the giant spearton deads has 230+ damage and its the same damage as the pouncers. They also have thousands of hp thats why its difficult to get rid of them.
dude this mode is literally impassable rn, i just want to reach to night 21 but it's literally impassable to pass night 10 Edit: thank god i finally did it, now i have all achievements