Where Does the Mystery Key Go in Undertale?
RepeatingRitz路3 months agoJust use the Mystery Key on the locked house in Waterfall near Napstablook's place. Get ready for some juicy details about Mettaton's past!
Win gift cards by playing fun games on Playbite!
Playbite
500k winners and counting...
More Answers
The Mystery Key unlocks the house next to Napstablook's! It's Mettaton's house. Look out for some cool backstory and lore inside.
Mystery Key? More like the key to unlocking Mettaton's dramatic history! It's the locked house in Waterfall.
Honestly, the Mystery Key is a bit overrated. It's for the locked house next to Napstablook in Waterfall. Not much else to it.
馃憖 If you like Undertale...
Diego路3 hours agoThe brands referenced on this page are not sponsors of the rewards or otherwise affiliated with this company. The logos and other identifying marks attached are trademarks of and owned by each represented company and/or its affiliates. Please visit each company's website for additional terms and conditions.
People also want to know
Add an Answer