What would need to be changed to run an adventure for 1player?

@Paranoxia @ChrisPerkinsDnDWhat would need to be changed to run the Starter Set adv. for 1player? DMPC or two to help with fights? yeah, I'd go that route. it's the easiest path. balancing for one is very tricky – bigger group absorbs luck

— Mike Mearls (@mikemearls) May 12, 2016