There are loads of intricately simulated mechanics in Project Zomboid, but none of them are particularly fun to interact with. In fact, most of them are boring or miserable to engage with.
A lot of its systems are impressively detailed in isolation, but the actions the player repeatedly performs inside those systems are shallow. The developers seem to add mechanics with little regard for how those mechanics affect gameplay pacing, decision-making, or fun. They add things for the sake of simulation, without always asking whether interacting with them actually makes the game better.
The devs have built a zombie combat system involving multiple weapon types, armor zones, and a system where your emotional and physical wellbeing affect your ability to swing a weapon, aim calmly, and catch your breath.
Is fighting zombies fun, though? Not really. The basic combat loop consists of slowly backing away while swinging your weapon until your character gets tired, then running away to rest for a bit. That is essentially the entire loop.
Because of the permadeath mechanic, and the fact that zombies can potentially kill you in one bad encounter, the zombies seem to have been balanced around being relatively nonthreatening. On the default difficulty, you can power-walk away from them or weave through streets crowded with them without much difficulty. Once you understand the basic techniques for managing zombies, the main ways to die are getting bored and losing focus, making a careless mistake, or trying to fight a large group without bothering to split them up first.
Turning the difficulty up until zombies are genuinely threatening does not necessarily fix the problem, because permadeath makes every death extremely punishing. If dying means repeating hours of tedious progression, making zombies dramatically more dangerous can easily make the game more frustrating rather than more fun.
The devs have also built a dozen different crafting skills, ranging from farming and carpentry to mechanics and flint knapping.
Is this system fun to interact with? Again, not really. Much of it boils down to spamming low-value or useless actions in order to raise a skill high enough to finally do the interesting stuff. If you die, you lose all of those grinded skills, which can represent hours of real-world time.
I am not opposed to losing progress in a permadeath game if rebuilding that progress is fun. The problem is that much of the progression in Project Zomboid is not fun to repeat.
The devs have built a massive, sprawling world with an enormous amount of attention to detail.
Is that world fun to explore? Often, no. Most locations contain very little of interest, so experienced players tend to learn which locations contain valuable loot and head directly there. Many players simply use the online interactive map.
If you spawn somewhere isolated, you may have to pick a random road and follow it while hoping it eventually leads somewhere useful. If you choose poorly, you can spend an enormous amount of real-world time walking through mostly empty terrain without encountering anything interesting. The in-game map starts blank, so the game itself often gives you very little information to make navigation interesting rather than arbitrary.
The devs have also created a detailed vehicle system that simulates the health and condition of individual components such as the battery, engine, tires, brakes, and suspension.
Is this fun to interact with? Not especially. Like the crafting system, progression often means repeatedly dismantling cars and putting them back together until your Mechanics skill is high enough to do what you actually wanted to do.
Made a cool car? Great. Drive too fast, crash badly, and your character can die.
At the end of the day, you are left with an exceedingly impressive and detailed simulation that seems primarily designed to be exactly that: a simulation.
The problem is that simulation depth is not the same thing as gameplay depth.
Project Zomboid contains an enormous number of variables, systems, skills, objects, and simulated interactions, but much of that complexity does not translate into interesting decisions for the player. Instead, it often translates into repetitive procedures that you perform over and over again.
I love hard and challenging games, and I do not mind losing progress when failure is part of an interesting gameplay loop. But difficulty needs substance behind it.
Project Zomboid often feels less like meaningful challenge and more like grind wrapped in an extraordinarily detailed simulation.
