No you dont but when you will have granite and marble a underground desert biome then you must make a New World one World in normal and a other in Expert Mode for the treasure bags
...can someone rephrase that?
If you want to have the new mini-biomes and other new features of world generation, you must create a new world.
ah, thanks.
[DOUBLEPOST=1435861382,1435860946][/DOUBLEPOST]Anyone know what's in this expert mode? What's new?