However, none of them so far seem like it'd make the game impossible without the cheats, so I am very interested in when the game's difficulty ramps up more. So far, the MC has fought 2 "Elite zombies" which have supernatural abilities, the first one is strong and would be a game ender for most players, but we learn that it's a simple enemy that just requires a shotgun when the zombie charges with it's mouth open. The 2nd "Elite" is basically an angel, which would kill 99% of players who fight it, but it has a mechanic that's exploitable, so on multiple playthroughs and and hindsight, it isn't the wall that maked the game impossible. I'm very interested in finding out more about what in particular is so impossible to defeat.

a cult coming to the school and press-ganging some students via their parents' influence. MC doesn't react and lets them take away the students forcefully... well ok, and then later the students come back with the cult when the MC is away, break open the gate, steal munitions and cause more than half of the students and teachers to die after allowing zombies to break in.

When the zombies are cleared out they find out that "The damage didn't end there. The infected roamed freely within the school, contaminating most of the facilities. Half of the ammo and food supplies in storage were lost." Excuse me? Mindless, s*upid zombies only interested in eating humans. Food and munition not taken away, not damaged, just... "contaminated." The explanation stops there, and the MC's group decides to move away, thinking the school is too dangerous... which is genius considering they had a large place for themselves with cooking facilities, bathrooms, and even a place to grow crops, in addition to a local shopping mall they had secured some time earlier, and of course they run into trouble pretty much immediately afterwards.

A researcher NPC of great importance to the plot was the sole survivor from the entire hospital, because all her colleagues killed themselves a day before the MC and solders arrived... seeing as the drugs they used were fast acting they could've just waited. Later she says the researcher says she lacks good quality research tools to progress her work on studying the virus once relocated to the school... and nobody thinks of just going to the hospital where they first found her, where her research was previously taking place.