here is a save showing every element that is not listed on the menu

LoadSaveBlock(70264);

IF YOU FIND ANYMORE NON MENU LISTED ELEMENTS PLEASE POST IT ON THE "hidden elements" topic in general

there are 17 hidden elements overall in version 44.6 our topic and my save have them all

this is the list af all unlisted elements
dyst dead yeast
shield 2
shield 3
shield 4
@_@ solid
@_@ gas
solid paste
bray
brime
fog
lolz, the word lol**
inst, instant wire**
frzw,freezing water**
love, random hearts**
frzz, freezingn snow**
mort, steam train**
iron

**these elements were silly elements in crackers original mod

Actually if you press the Ctrl and Alt buttons on the RIGHT side of the keyboard, a hidden menu will appear, this menu includes:
LOLZ
INST
BIZS
BIZG
FRZW
FRZZ
LOVE
FOG
RIME
MORT
and
IRON

Have fun

Why this category is hidden? What's wrong with it?

On the right side of your keyboard are another set of CTRL and ALT keys. With Powder Toy open press them at the same time, this will open a menu with LOLZ, INST, BIZS, BIZG, FRZW, FRZZ, LOVE, FOG, RIME, MORT, and IRON. These are easter egg element so don't ask stupid fucking questions like "why are they hidden?" or "is something wrong with them?", they were added as an extra(inference fail kids).

Focke-Wulf