Hexxit

"Gear up and set forth on a campaign worthy of legend, for Hexxit has been unearthed! Dark dungeons, towering spires, weathered ruins and musty tomes lay before you. Lay claim to riches or create your own artifacts, tame beasts and carve out your own story in endless wonder. Alone or with friends, adventure awaits in Hexxit.

Hexxit is a new collection of mods for Minecraft that put adventure above all else, in the style of old Dungeons and Dragons campaigns. Exploration is interesting, the dangers are greater and the sense of satisfaction of clearing out a dungeon is intense. The modlist is full of quality content from some very talented individuals. Be sure to head over to the donate page and show your appreciation!"

- The official description

Hexxit is a Technic modpack created by the Technic Team. It is designed to encourage exploration through its many dungeons, with some inspiration from Dungeons & Dragons. Hexxit is possibly the most popular (by downloads) Technic modpack, and one of most popular modpacks in general, with near 8 million downloads.