Which is More Dangerous: The Overworld or the Nether?

This is a question I have wondered for a long time. Is the Nether REALLY more dangerous than the Overworld, or is it all an illusion created by the hell theme of the Nether? I mean, the Overworld has monsters that can one-shot you from full health and full iron armour, and there is the all-too-famous NEVER DIG DOWN rule for a reason...

As I was compiling notes for this rant, I realised the more and more I thought about it, the harder this question becomes to answer. There is SO much to consider. The answer is complicated further by the fact you will never start in the Nether. By the time you get to the Nether, you will have progressed some. You will have armour and weapons and a plentiful supply of food. When you start a new game, you are in the Overworld, totally naked. No food, no armour, no weapons.

The Dangers of Each...

The Overworld and the Nether also have considerably different hazards. The Overworld's only substantial environmental hazards are occasional lava and accidentally falling into a large cave and dying from the fall. There are some other niche environmental hazards, such as plants that fight back, drowning if you go exploring the oceans, and freezing to death in mountains. But even with the common hazards, with obvious exceptions such as mountains and very deep underground, the odds of encountering big falls or lava are pretty low. Obviously, caves are also a lot more dangerous, with a greater chance of lava and falls if you dig straight down. Ravines of course can be particularly dangerous for their big falls and lava floors. Unless you adventure into structures or ravines or go deep-sea diving, most of the Overworld is actually pretty safe. At least, on the environmental front. Lava is the biggest danger, really.

However, that's not the full story. I'd argue the majority of the deaths in the Overworld are at the hands of any of the common hostile mobs that can spawn in darkness. In particular, creepers. The most iconic mob in Minecraft is labelled so for a reason - its ability to sneak up silently on the player and explode, dealing MASSIVE damage that can even be fatal from FULL HEARTS AND ARMOUR on higher difficulty levels. RIP half of all hardcore runs ever. Skeletons can also be a bit of a bother as they can shoot you from 16 blocks away. Zombies come in hoards from up to 40 blocks away and can also overwhelm you if you're not armed. The fact these mobs are so common definitely makes the Overworld a very dangerous place to be at night, or in any unlit area.

In every 20 minutes of gameplay in the Overworld, there are 7 or 8 minutes where hostile mobs can spawn. And when they spawn, they can spawn in LARGE numbers. At night, an area can become dangerous enough that new players shouldn't go out at all or they have a high risk of swiftly dying. They should also be very wary of caves, where mobs can spawn all the time until it's lit up.

When discussing danger in the Overworld, the hostile mobs contribute far more than the environment itself.

With the Nether, the reverse is true. 

One of the main features of the Nether is its extremely hostile and difficult-to-navigate terrain. We're not just talking about occasional lava anymore. We're talking about entire OCEANS of the stuff. And it's not just the oceans - on the "surface" of the Nether, there are random hidden pits ALL over the place that will lead you to a fiery demise. Not only that, the risk of dying of fall damage is MASSIVELY amplified in the Nether, as it is categorised by ledges that may be very high up, and holes in the ground that may be hard to spot. The player might try and make a jump, underestimating the length of it and falling short - the consequence of which is often fatal as the drops in the Nether can be vast. Some biomes, such as the Basalt Deltas, take this and crank it up to 11, as the biome is FILLED with random pits of lava and the terrain itself is literally a parkour challenge.

In the Nether, most of the creatures are hostile, and, unlike in the Overworld, they can spawn 100% of the time. But this isn't as much of a problem as you might think. The mobs you're most likely to encounter in the Nether (which are still far sparser than in darkness in the Overworld), only deal melee damage, don't move very fast, or don't have as much health. Add to this, many of the mobs can be made neutral or run away from certain blocks or items. As such, even though some of the enemies can hit hard, they're usually pretty easy to deal with, even without lots of armour and high-tier tools. As mobs spawn far less frequently in the Nether than in the Overworld, they are a lot less likely to overwhelm you. Unless you hit a Zombie Piglin of course, but that's your fault.

The exception to this is of course the Ghast, which can shoot explosive fireballs at you from far away, and they can be very hard to kill as they fly fast. But Ghasts don't spawn that frequently, and they're pretty rare. Still, they are easily the most dangerous of the general Nether mobs, as they are tough to kill and can shoot you from a very long distance.

Of course, with all Nether mobs, particularly Hoglins and Magma Cubes, there is always the risk they will push you into lava or off a ledge, which could have fatal consequences.

So Which Is More Dangerous?

If you are totally naked, no food, no weapons, no tools, and you're starting afresh, the answer is a no-brainer. Starting in the Nether would be MUCH more difficult and the Nether would be at least an order of magnitude more dangerous. With the Overworld, the environmental risks are very low. But the real danger from the mobs doesn't start until at least 10 minutes into the game, giving you a considerable amount of time to build a hut and gather basic tools. With the Nether, there is no 10-minute grace period. Not only do you have the insanely high risks of the terrain, when you are totally naked, encounters with the hostile mobs there (including Piglins), can indeed often be swiftly fatal. Add to this, the only source of food native to the Nether is Hoglin meat. And while Hoglins aren't a problem with decent armour and tools, killing one with at best a stone sword and golden armour is not easy. The odds are stacked against you in that fight. Then again, you can always steal a kill from a Piglin (if you're wearing golden armour of course, or else the Piglin will slaughter you).

If you do have decent armour and tools though, and you've progressed to the mid-game, the mobs in the Nether are unlikely to kill you unless they overwhelm you. But such overwhelming encounters should be less common as they don't spawn as regularly as hostile mobs in darkness in the Overworld.

With high-level armour and sword enchantments, you can be protected from just about any mob in Minecraft, Nether or Overworld. Late-game gear basically guarantees the mobs will no longer be dangerous. However, the environmental hazards (which can also be mitigated with late-game gear), are still a lot more pressing. There are still huge pits of lava. There are still fatal falls around every corner. And of course, inherent to the Nether, resources are a lot scarcer. Food is much harder to obtain due to the difficulties in establishing a farm of a large, hostile enemy.

Because of these factors, the Nether is obviously harder to survive in. Much later-game equipment is needed to not be at high risk of death in the Nether, and you need to be much more careful and calculated in your gameplay so as to not succumb to a fatal fall or dip in lava. The fact you can't use water buckets to abseil down or extinguish yourself if you're on fire only compounds these environmental hazards even beyond mitigations.

So the conclusion here is pretty simple. The Nether needs far more precautions to survive, therefore Nether is definitely the more dangerous place.

But.

Is there anywhere in the Overworld that IS more dangerous than the general Nether?

The Caveats

I made a list a while back where I ranked the most dangerous places in Minecraft. Despite the Nether biomes dominating the list, there were SOME areas of the Overworld that ranked higher than some areas of the Nether. But these are not part of the general Overworld, and you would have to actively seek these areas out.

The Ocean Monument is what I consider to be the most dangerous place in the Overworld. Being surrounded with hostile mobs that do considerable damage as well as not being able to mine walls, all while being underwater, make this so. I believe the Ocean Monument is far more dangerous even than the most dangerous biome in the Nether, the Basalt Deltas.

As I mentioned earlier, ravines can also be incredibly dangerous. High falls, lava, and divebombing creepers make this place a death trap if you're not prepared. I believe ravines are more dangerous than the general Nether, and even the Crimson Forest biome. Of all the caves in the Overworld, the ravine is by far the most dangerous.

There are other situations in the Overworld that can be incredibly dangerous in comparison to being in the Nether - such as being in a Raid. 

There is also a designated "safe spot" in the Nether - the Warped Forest. This biome makes up under 10% of the area of the Nether, however. And even so, the place is FULL of Endermen. One accidental look in the eyes of an Enderman, and the safe spot no longer seems so safe. Even with this and the other environmental dangers in the Nether, I still rank this biome as less dangerous than being outside in the Overworld at night.

So yes, there definitely ARE situations where the Overworld is more dangerous than the Nether. But overall, I would say the Nether is considerably more dangerous. As there are so many factors, it's very difficult (if not impossible) to objectify HOW much more dangerous the Nether is on average, but I would definitely say that in the average playthrough, the Nether is a considerable step-up in difficulty.