The Drought Experience (Rain World highlights) (1.5)

Another great mod. Was made by a whole team of people and can be found at the top of the list on www.raindb.net/
Simple region map: i.imgur.com/nX...
Next mod I'll probably do is either the root or enemy randomizer. I tried the room randomize earlier, but found it really underwhelming - so we'll see if the enemy one is worth doing a full playthrough of.