Music for the End of the World introduces a few notable changes with respect to zombies.

First, we have the Music Maniac. A particular zombie that carries a unique hair dye (Jade Hair Dye), as well as an amazing treasure trove of cassettes and music-related items! If enabled, she is also one of the only sources for the rare Unique Tracks associated with Special Guests. The Music Maniac is very rare.

We also have a new system that allows zombies to play music, which can attract other zombies (and you)! This is used fairly sparingly by the mod itself unless you enable Special Guests (see below), as it only applies to the Music Maniac. These zombies appear wearing a Backpack Boombox to explain their music. This system is expandable so that players can make their own musical zombies should they wish, with a guide and templates accessible here.

Finally, we have the Special Guests. This is a group of nine special zombies who appear only if you have a certain array of cosmetic mods enabled, which you can see here. For full details, you can see a full list of every zombie and the loot they carry here, and a screenshot showing the outfits is on the main page of the mod. In addition to carrying music and survival loot, they may sometimes have unique versions of clothing from other mods or vanilla. Of course, their main function is to carry music however! They each carry a dynamic playlist of 10-19 songs chosen for that particular zombie, depending on which MFTEOTW packs you have enabled:

- 10 songs from the Main pack.
- 2 from the Extended pack.
- 1 from the Silent Hill pack.
- 1 from the Home Labelled pack.
- 1 from the Encore main pack.
- 1 from the Encore extended pack.
- 1 track from the Encore SH pack.
- And one unique song that can only be found in that zombie's inventory or from the equally rare Music Maniac, if enabled.

The Special Guests are just as rare as the Music Maniac, to account for the value of the loot they carry. Special Guests introduces the following unique loot to the game, which can be disabled via sandbox settings:

Gravedigger, a shovel that has the statistics of a crowbar.
Ol' Reliable, a pool cue with the same.
Banshee's Wail, a guitar with the same. A lot of reskins of the crowbar...
Big Matches, Big Propane Torch, Large Canteen (as from Authentic Z), all of which are larger versions of their namesakes with slight advantages.
Big Toolbox and Big Satchel, with values comparable to vanilla high-tier bags.
A mask and a hat with some minor defensive statistics.
A large, tintable duffle bag with identical stats to the best vanilla bag.
Several shades of hair dye.
Most, though clearly not all, of these are reskins of vanilla items intended less to affect balance and more to expand fashion and style opportunities.