RLCraft

"Bottom line is, this ain't your dad's Minecraft, and you're going to die...a lot. Just be prepared for that. This tends to happen whenever I make mods for any game for some reason...it usually ends up being unfairly difficult."

- RLCraft's CurseForge page

RLCraft is a CurseForge modpack made by Shivaxi. It is a survival focused modpack with heavy tweaks and a very high difficulty.

The most prominent mods are Tough As Nails, which adds temperature and thirst to monitor, Rough Tweaks, which removes natural health regeneration and requires the use of special healing items, Skillable and Level Up!, which provide skill trees to unlock, as well as Lycanite's Mobs alongside several other mob mods like Bloodmoon, which make the world highly dangerous.

Several mods that add structures to explore are also added, such as Ruins, Recurrent Complex, Doomlike Dungeons, Roguelike Dungeons and AtomicStryker's Battle Towers.