Here are the challenge rules:
Loot nothing before arriving at Sanctuary (except the hot plate in the shelter)
Never leave the buildable area
Survival mode
Loot ONLY one crystal source in the small shelter behind the house
Reach the maximum possible population
Reach level 50
Have a level 3 store for each type of shop
Music link:
https://legismusic.com/music/
/ anthox-colaboy
https://www.purple-planet.com