Yeah, challenges are a thing, but what if you could change the game entirely? Thats why i think of gamemodes!
Basically, they change how you play or is supposed to beat the game, and if you are feeling spicy, you can also add challenges! Maybe there could be challenges made just for a specific gamemode, or certain challenges wouldnt be allowed in certain gamemodes.
Edit: its for shattered pd
Home Equipment: a normal game... except no items spawn, just gold, potions and throwable weapons, nothing else, you are basically forced to rely upon your starting items. Once you go to the next region you will be able to choose a new weapon and armor