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After you beat the game and have access to the Starflight Express, you can get a DLC quest(extra quest) and Stella will give you a quest. Afterwards, you have to talk to Sterling and he'll give you another quest and that's when Stella locks herself inside that door. That door is actually her room. I haven't beaten the quest yet, but I'm assuming you'll have access to it after you beat the quest.
MrBGamer - 6 years ago
Most locked doors can be opened via the ultimate key given during gameplay automatically.
onvicco - 6 years ago
it's a DLC quest (#150)
talk to stella near the locked door, and after completing the quest, go talk to stella again
LMSfreak - 5 years ago
Yea its a add on quest that stella will give you when you beat the game.You have to do stellas quest,then sterlings.then youll get a quest from(spoiler)Stela supreme queen of the starflight.And then you can accept it and its called like abaneakillamakanation or something its alota names combined but yea.Thats how you get it.For more details you can check the quest guide.Thats all I can tell you for now.
links74 - 5 years ago
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