AC&A is a very large mod mainly based around science It is REALISTIC (but I will not claim it to be factually accurate) some things are simplified for gameplay (though not massively) and some things I have not been able to find good sources.
Available Versions
Version
Minecraft
Loaders
AC&A Grand Update Pt. 1
1.21.4 - 1.21.11
neoforge
Ready to use Advanced Compounds & Alloys?
Create your Minecraft server and install the Advanced Compounds & Alloys mod with one click!