Talk:Nightmare Mode/@comment-2A02:C7F:5069:3400:70CA:7B16:FD03:6C6F-20190404140212

"To unlock Nightmare Mode on a given planet, one must complete all mission nodes on that  planet (barring Dark Sectors)." Might be worth adding that you do NOT need to complete planet junction nodes (which are technically also solo missions according to this wiki) in order to unlock nightmare missions