I have been playing some more 7 Days to Die (7DTD) now that the Alpha 17.1 patch came around. There have been a lot of tweaks to the progression mechanics and Perk system, including some level-gating on Iron/Steel tool recipes. The biggest change, however, was to zombie AI.

In short, zombies are now impossibly smart… and impossibly dumb.

It’s been long enough that I don’t even remember how zombies behaved in prior patches. What zombies do now though, is behave in perfect tower defense intelligence: the shortest distance between them and you, with walls adding a virtual number of steps. Zombie are also perfectly prescient, knowing exactly which wall blocks have the lowest remaining health, and will attack that spot en mass to get to you. At the same time, zombies prefer not attacking walls to X extent, if they can walk there instead.

The result? Cue the Benny Hill theme:

Essentially, the current 7DTD meta is to not create bases at all, but rather mazes that funnel zombies into kill zones and/or large drops that loop them around until they die of fall damage. The devs have added a “zombie tantrum” mechanic to try and get some damage on looped mazes – zombies will attack anything nearby when they fall, possibly weakening your support pillars – but that will be metagamed away with multiple platforms or deeper holes.

To be clear, the prior zombie meta was solved by simply building an underground bunker. At that time, zombies could not dig into the ground, and disregarded the Z axis entirely – it was possible to hang out in the middle of a bridge and often have a nice grouped pile of zombies directly below you to hit with a Molotov. I played the game enough to recognize which Point of Interest had a pre-built bunker located underneath it, and often sought it out immediately after spawning so I could all but ignore the titular 7th day horde attack.

That said, how smart should zombies be?

The only way to answer that question is to ask what the game you’re making is supposed to be about. When you add tower defense mechanics, you get a tower defense game. This will preclude people from building nice little houses in the woods, and instead opt for mazes and obstacles and drops. It becomes a much more technical game, solvable with very specific configurations. Having dumber zombies frees up a lot more base designs, on top of possibly requiring a lot more attention to one’s base after an attack, as a single “dumb” zombie could be weakening a support in an unused corner.

My initial “solution” would be to mix and match, but I think that’s actually the worst of all possible worlds. Instead, I think zombies work best as environmental hazards. Bunkers might make you invulnerable to nightly attacks… but you have to leave sometime. Shouldn’t the punishment for hiding underground be the simple lack of information of what’s going on, combined with having to spend your morning hours slaying the zombie hordes milling about outside?

I guess we’ll see what the devs eventually decide. At present, there simply seems to be a maze-based arms race at the expense of any sort of satisfying nesting. If the 7DTD devs want to double-down, well… thank god for mods.