What's the Mystery Key for in Undertale?

DealingDada·a year ago

Undertale

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BackingPeck·a year ago

The Mystery Key unlocks the house next to Napstablook's in Waterfall. It's totally worth it for the lore!

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BackingPeck·a year ago

The Mystery Key is used to unlock a house in Waterfall. It mostly just adds some extra story details.

EarningOunce·a year ago

Honestly, the Mystery Key just unlocks a house in Waterfall. Not essential, but hey, more story is always good, right?

BeatingDebit·a year ago

You can use the Mystery Key to access Mettaton's house in Waterfall. You get a peek into his past!

👀 If you like Undertale...

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