Endless Winter [V1.0.0] is a very challenging survival modpack where you survive in a desolate and cold world. It features a stamina system, harsh temperature mechanics, creepy ambiance and more.
Also shaders are VERY recommended.
Recommended shaders: (Iris Shaders)
Tips:
Make a campfire as fast as possible, as it regenerates your health and warms you. You can also burn yourself to heat up faster. Make sure to place it under a roof or it'll burn out.
Make a base (underground base recommended) and get a light source ASAP, as the night is pitch black.
Food is a big problem. You can cook rotten flesh to get a reliable food source.
You'll eventually get lost, as there are no coordinates, so make sure to highlight your base!
(Worlds might take long to generate)
If you want to play with friends download the Essential Mod and host a world.