Most Important Gameplay Adjustments
Day length increased to 6 hours (432000 ticks) from 20 minutes (24000 ticks). (Extended Days)
Sleeping no longer skips the night. Instead, speeds up the time while simulating the world. Sleeping during the daytime is now allowed. (Sleeping Overhaul)
Hunger no longer decreases based on players' actions. Instead, it passively decreases over time. (Hunger Tweaker)
Players must eat different foods to replenish specific nutrients. (Nutrition)
Thirst & Temperature added. (Simple Difficulty, Armor Underwear Mod)
The old health bar has been replaced by 8 different health regions; head, body, legs, and feet each have their own health bar. (First Aid)
Walking speed reduced by 50%, sprint speed reduced by 25%. (Walk Overhaul)
Players can no longer sprint for more than 12.5 seconds. After 12.5 seconds of sprinting, stamina will start to refill after a 1.5-second cool-down. (Walk Overhaul)
Reach range reduced to 2.8 from 4.5. (Reach Configured)
Players' screens will go black every 15 seconds. Players can manually blink to restart the timer by pressing "B". (Blink)
Players can now climb two-block heights by pressing the jump key twice. (Wall-Jump!)
Players can take damage if they hit walls fast enough or bump their head on the ceiling. (Collision Damage, Headbump)
Foods will spoil after some time if not kept in a freezer. (Food Spoiling)
Experience system disabled. Anvils no longer require xp. (Universal Tweaks, Anvil Patch - Evil)
Players can crawl by pressing "CTRL + ALT". (Aqua Acrobatics)
Underwater oxygen time increased to 25 seconds (500 ticks) from 15 seconds (300 ticks). (Better Diving)
Players can now encounter tornadoes and hurricanes very rarely. (Weather 2 - Remastered)
First-person view locked. (FPV Lock)
Monsters disabled; new peaceful and predator animals added. (Mo’ Creatures Extended)
Nether & End disabled.
Crafting is no longer instant. (Craft Takes Time)
Water is no longer infinite. (Universal Tweaks)
Farms no longer require water. (Waterless Farmland)
Most Important Features
HBM's Nuclear Tech Mod added as a base and almost everything relies on it. (HBM's Nuclear Tech Mod)
27 visitable planets & moons added. (Advanced Rocketry, Aliens vs. Predator, SCP: Lockdown, Dungeons Mod)
Map & Mini-Map added. Players must send satellites using Advanced Rocketry machines and craft an "Orbital Uplink" device to access the Map & Mini-Map. (Xaero's)
Worlds are no longer infinite. When players travel far enough, they will eventually return to the same location. Also every planet's surface area is different. (121 Core)
Worldgen & biomes overhauled. (Realistic Terrain Gen, Biomes O’ Plenty, Biome Tweaker)
Vanilla ore generation disabled. Ore veins are now much bigger but also much rarer. (Large Ore Deposits)
System Requirements;
Client RAM: 5 GB
Server RAM: 4 GB (+500 MB per player)