Zombies

What are Zombies?
Zombies are NPCs in the game that are hostile to players. They can be found in caves as well as certain structures. Upon a player's approach, zombies will let out a hiss and rush to attack the player. Zombies at shallower levels deal lighter damage while those at lower depths will deal more damage, sometimes also having special abilities. Zombies also have the capability to chew off limbs as they attack, beginning with the player's legs and ending with their right arm. They can be slain with swords, which will grant a few thousand experience and drop a small quantity of ores (between 1 and 7 ores, inclusively) found in the layers that they appeared in.

If a player comes across a zombie cave, mineshaft, or dungeon, the zombies can be heard laughing and giggling (and occasionally hissing) as it generates, which is a warning of their presence.

Zombie
Zombies are the first enemies most players encounter, appearing in the shallow layers (0-600m). To kill them, players must swing their sword at them until the zombie's health is deleted. Crafted traps can also be used to kill zombies if you can lure them within reach. They grant a few thousand experience to their killer (except if traps did the killing blow) and drop a small quantity of common ores. Their torso is labeled with an emblem of Epidote.

Flying Zombies
Flying Zombies are enemies found in the sky zone (50 meters above the digsite), bearing wings and lingering in the air when idle. They have significantly more health than normal zombies, and can fly to attack the player instead of running. They drop several sky zone ores, however since these aren't minable until the player reaches the Malachite Miner ranks and above, it is not advised to visit this area for experience until then, not even to kill them since they only yield 10000 experience. Their torso is labeled with an emblem of Cloud Shards.

Zwambie
Zwambies are enemies that replace Zombies in the Scary Layer (600-1000m). Instead of continuously dealing damage to players, they will very quickly rush to players and explode upon contact, heavily damaging players but dying immediately and dropping no ore. If they are killed with a sword, they will grant experience and drop a small quantity of Scary layer ore. Their torso is labeled with an emblem of Boomite.

Zambie
Zambies are enemies that replace Zombies in the Deep Dreams, Deep and Deeper Layers (1000m-2000m). They are tougher than normal Zombies and deal more damage, and when killed they will drop a small quantity of ores that are found in the layers that they are in. Their torso is labeled with an emblem of Azure.

Deep Zombie
Red Zombies replace Zombies in the Underworld Layer (2000m-3000m). They are faster than normal zombies, which makes outrunning them more difficult.

Green Zombie
Green Zombies replace Zombies in the Radioactive Layer (3000m-4000m). They are slower than normal zombies.

Cave Zombie
Cave Zombies replace Zombies in the Caves Layer (4000m-5000m). Being attacked by them will reduce your speed, so a visit to your Speed Giver may be needed to get yourself back to regular speed.

Void Zombie
Void Zombies replace Zombies in the Caution Layer (5000m-5500m). They are invisible until they attack the player, which makes them incredibly difficult to fight.

Core Zombie
Core Zombies replace Zombies in the Core Layer (6000m-7000m). They set players on fire, damaging them over time even if the Core Zombie responsible for it was killed.

Corrupted Zombies
Corrupted Zombies replace Zombies in the Corrupted Layer (9000m-9150m). Upon noticing the player, they will instantly teleport right behind them. This can be very devastating if they spawn close to the player while the cave is generating, taking players by surprise.

Warped Zombie
Warped Zombies replace Zombies in the Warped Layer (9167-10000m).

Abyss Zombies
Abyss Zombies replace Zombies in the Abyss Layer (10000m-11000m). On top of having incredible health (the most of any zombie), they are able to blind players upon damaging them, which makes fighting them very difficult if you are not careful.

Miner Zombie
Miner Zombies are enemies found in mineshafts instead of the local zombies, wearing a miner hat and carrying a pickaxe. They behave identically to regular Zombies. Since they replace the local zombies, they can drop ores that are found up to 500m below where they were.

Sword Zombie
Sword Zombies are enemies found in dungeons instead of the local zombies, holding a sword. They have more health and deal more damage than regular zombies, however they do not know how to actually swing the sword, so their range is unaffected. Since they replace the local zombies, they can drop ores that are found up to 500m below where they were.

Boss Zombies
Boss zombies are huge zombies with more health and damage, rarely appearing in caves as a singular zombie instead of a horde of zombies. They can also throw loose blocks of Boomite at players to damage them, though it won't destroy tiles. Upon defeat, they grant more experience and drop a massive quantity of ores found at the layers they spawned in. They can also hold rares, dropping one of it when killed. They also always spawn on top of a tombstone, which can be stolen with a pickaxe to use as a decoration.

The Mutation
The Mutation replaces Boss Zombies in the Abyss Layer (10000m-11000m). The Mutation inherits the powers of both Boss Zombies (being very strong) and Abyss Zombies (having great health and the ability to blind players) as well as gaining a new ability to fire lasers at players from far away.

Trivia

 * It is possible for the same cave to generate two types of zombies. For example, if you found a zombie cave right across the 1000m line, it could contain both Zwambies (scary layer zombies) and Zambies (deep dreams layer zombies).
 * The majority of zombies generate standing on top of moss blocks. Like the tombstones of Boss Zombies, these can be stolen with a pickaxe for decoration.
 * The horizontal Layers (Lost at 2500X, Rift at -2500X, etc) do not seem to have special effects on zombies.
 * Zombies do not seem to appear in Geodes.
 * Zwambies have a higher pitched warning laugh than most zombies.