Welcome to the official discussion thread for Undertale on the Switch!
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Undertale is a game that nobody understands how to talk about without spoiling. I'm making this thread now to encourage you not to read it or anything else about the game until you're done.
Undertale has a lot of secrets. Some of these secrets might seem hard to get to; do it anyway, the payoffs are worth it. As long as you have questions, keep playing. Don't use a guide. Experiment.
When you're finally fully satisfied with the game and feel that you've seen all it has to offer: start up a new game and grind for XP in the starting area as long as you can, not letting a single monster get away alive. After a while, something cool will happen; stick with it no matter what.