Advance through 4 stages of tech. Start with simple machines and work your way through nuclear fission and fusion up to black and white holes, in order to tame the 248k Element. This mod is designed to be playable in already existing worlds since it changes nothing on world generation. Can be played as a standalone mod or in overhaul mode.
Large total conversion mods.
see
see
if you wish you can make a pr for that. I am aware of some of those things but other work currently has priority.