I really like it, but I will warn that the learning curve is not shallow, and this is exacerbated by the fact that the game keeps changing and being rebalanced, so strategies change a lot over time.

Also, there used to be a (seriously out of date) wiki that a fan ran, but that went down a few months back, so it makes the curve even steeper.

When I first started playing, many years back, recreational drugs were a fantastic tool, because they provided tremendous stat bonuses. Those got nerfed; there are stat bonuses and reasons that you might want to take a stimulant or depressant or maybe stay awake, but drugs aren’t magical enhancers any more, work more like in real life.

There was an era when unarmed combat was really powerful – unreasonably so. I personally enjoy playing unarmed characters, and you can still do it, but it’s a lot more like trying to play unarmed in a real-life apocalypse – not easy.

Fighting basic zombies changed a lot, making crowds much more dangerous, when they got the ability to do things like grab someone and prevent dodging when grabbed, when the number of attacks one could dodge was capped outside certain (weapon and unarmed) martial arts forms bonuses, and got the ability to do things like have the collective mass of a crowd of zombies pushing against a wall push things over.

Food used to be a serious problem; now I don’t find it to be particularly an issue.

And there’s a lot of unintuitive stuff. In almost all games with zombies, night is the enemy. But for most types of builds in Cataclysm: Dark Days Ahead, night is your friend, especially in the early game. Yes, it hides zombies. But it also hides you and aside from their sense of smell, for most zombie types, your senses are superior to theirs at night, and it’s more critical to not run into crowds of them at night). So doing night raids on towns for supplies is generally a good idea.

There are a ton of stats, and a lot of them are hidden, and a lot of complicated mechanics, like multiple items in one slot (e.g. multiple items on a given layer on a given body part having an encumbrance penalty over the normal impact).

So it has an extremely ungentle learning curve. But…you also won’t run out of stuff to play with for a long, long time in that game. Can modify clothing items, like Kevlar or fur-line clothing. Firearm recoil is modeled. Can follow various mutation trees and “break threshold” in one tree, get more powerful mutations in one (be a humanoid feline or a tree-like critter that can feed on sunlight). Fat reserves. You can have tank treads on a vehicle, stick solar panels on the roof of a building and then wire the walls down to a subterranean base and set up lighting and dig a well, hack into robots to control them (or in some cases, use relevant credentials, like military or police), start wildfires, join forces with alien species trying to wipe out humanity, mount a tank gun on vehicles and blow through walls, reach the sea and board an aircraft carrier, auto-drive vehicles around the highway system…Caves of Qud (also a good game, considerably simpler) might have some degree of comparability in the number of ways in which you can interact with the world, though it has far fewer mechanics and amount of stuff.

One way I see people often recommend to come up to speed is to watch a streamer. This is not how I came up to speed, so I don’t know if I can recommend this personally, but it clearly works for some, and it does teach you some strategies that work with current builds.

Vormithrax is a popular streamer:

https://youtube.com/c/vormithrax

There’s a subreddit which has a fair bit of activity:

https://old.reddit.com/r/cataclysmdda/

And a Threadiverse community that doesn’t have much activity (well, yet!):

[email protected]