Basically, it's a modpack mainly made for friends, but since I put effort into making somewhat custom stuff and a lot of config editing, I decided to upload it for everyone.
Objective is to complete all major achievements (has custom FTB Quests line, enjoy!)
Remember to set world to Hardcore! (MODPACK IS BALANCED AROUND HARDCORE AND MULTIPLAYER WITH 2-4 PLAYERS)

SERVER PACK IN ADDITIONAL FILES
I recommend 4 GB of RAM for the server and client. (you might have to increase to 6 GB later)
Best if you use dedicated server, not Minecraft LAN option because if host dies game might end.
Personally I recommend using Exaroton Service, as this modpack isn't meant to be setup 24/7
Either you play together or die alone.

Playing in Party (Valid on versions 4.9+)

If playing in party press "[" to open team menu and add all team members after everyone is in a team, you may begin quests "P"

Voice chat configuration (how to)
If you're making a dedicated server your port may differ, so you gotta find the correct port (the one you're using for dedicated server should be in "server.properties")
and follow this path in server files "config\voicechat\voicechat-server.properties"
In that file find "port=19258" and replace "19258" with your actual port, save and close. (number may differ from "19258")
everything should work fine after that.

Main Menu Music
https://www.youtube.com/playlist?list=PL2U3JIUEE3zUQxzfsCUXnP3rlCJ7fFTal
My Discord Server
https://discord.gg/T7RtVhyjE4

You may modify files for your personal use.

Die Hard Forest

Ad Astra

Alex's Caves

Alex's Mobs

Amendments

AppleSkin

Architectury API

Ash API

AttributeFix

Balm

Better Advancements

Better Cave Dweller

Better Compatibility Checker

Botarium

Carry On

Cave Dweller Sound Overhaul

Chat Heads

Chunk Sending

Citadel

Clean Swing Through Grass

Cloth Config API (Fabric/Forge/NeoForge)