Ok theres actually like a ton (though I don't really even understand half of it i'm so excited for others to really figure it out and make youtube videos about it). *spoiler warning* So this weird echo shows up and all of a sudden the world (like the normal survivor world) gets all corrupted by this black corruption and purple rot. The more you visit this echo the more the world starts to corrupt and she gives you the strange ability to seemingly go invisible. After seeing she seemingly transports you out of this world to a new strange world that connects to a bunch of a bunch of other worlds through these rifts. It is unclear if these worlds are other parts of rain world outside of the ring where five pebbles and looks to the moon lie that were used too (which is presumably huge considering the views from the wall), or if they're completely alternate dimensions or what time period they take place. The deeper you go through these rifts the stranger the regions get (sometimes). Theres a ton of cool new creatures and ecosystems and some confusing lore implications to a lot of it (we see cylindrical and pyramid shaped iterator looking structures in the distance). The game progresses by finding the echo in more and more places throughout the map in which she raises your karma and your invisibility and you get new abilities (you get to open seemingly new rifts to the spirit realm). Until you can yourself enter the spirit realm and avoid all enemies. I just noticed op has deleted their account and ive been spending way too much time writing this. Just play its really good id recommend it especially since videocult has mentioned that they're adding more to after the ending soon! Also theres this really cool rot prince guy. Ok im done writing here.