The challenge is to travel to Five Pebbles as Survivor and then reach the final screen transition in the Void Sea. Essentially, it's a Pebbles% run: https://www.speedrun.com/rain_world#Pebbles
Whole run was kinda sloppy and that freeze in the Depths made things even worse.
The challenge is to visit all 6 echoes and then reach the Depths from the same shelter, while playing as Hunter.
I chose HI_S05 as my starting shelter. It's a nice option in a middle of the world, although getting to the Subterranean echo is a bit challenging - you can see that I got there when it started to rain, which means no echo music :(
The challenge is to return to the starting pipe after sleeping once, before the rain starts.
Plenty of methods to complete this, I chose squidcada flying glitch
Video of me completing The Martyr challenge in Rain World, part of 15 community challenges from the discord server. The goal is to travel through both sections of Unfortunate Development in one cycle, playing as Monk.
Sorry about the lag in 0g switch rooms, my CPU was struggling with recording and running the game at the same time :(