Harmony is just a library mod that other mods use as a reference to get cool things done. You’re going to need it for many of the mods that you want to use, so just load it up.
You’ll also want to grab HugsLib while you’re at it. Another library mod that’s required for even more mods, this is another no-brainer if you want to have any mods active at all.
Giddy-up! is an amazing series of mods that really makes a medieval playthrough possible. After all, what would a medieval game be like if you couldn’t have your knight riding to battle on the back of a horse? There are a few mods in the Giddy-up! Line-up that you’ll want to have, though, so make sure to grab them all.
Medieval Empire Overhaul takes the super-advanced “Empire” faction from Royalty and alters it so that it fits the medieval aesthetic. Now you can actually feel like you’re undertaking diplomatic efforts with a powerful kingdom of the dark ages! This requires Medieval Overhaul to run.
Realistic Rooms Rewritten makes so much sense with any playthrough, but far more sense when you’re setting out to play a medieval run. You can even control the size of the rooms further through the mod menu. Since I always thought the room size requirements for pawn happiness were wonky, this is a must have mod for me.
Rimedieval - Medieval Conversion is totally brilliant because it patches other mods, and certain aspects of the game (like the end quest) to keep them all in line with a medieval aesthetic. That way you can enjoy your favorite mods without having immersion-breaking additions.
Babies and Children is essential for a medieval RimWorld playthrough. Now you can have a real dynasty form, and, if you use one of the aging or time-alteration mods, you could even watch entire generations of your little kingdom drift by. Make sure to read the page for this mod, it has instructions for a couple of required mods you’ll need to install alongside.
There are so many brilliant mods out there for RimWorld, and it can get pretty overwhelming to install them all, but hopefully this list helps get you started on your next grand adventure.
I know there are probably tons of mods that I’ve missed, so go ahead and let me know in the comments what your favorite medieval mods are for RimWorld. What do you think I should have added?