There's a ... um... survey. Program. Thing.
Here.Download it. Don't worry, nobody has to die.
Tell Susie I said hello.
(Just to be clear...
yes, this is official. I'm not just linking to some random weird site. It is an
official Undertale-related weird site)
Now that the 24 hours are up, I'll be a bit more clear: it's not actually a survey (obviously), it's Chapter 1 of a new game called Deltarune that serves as a continuation (I won't say sequel) to Undertale. It tells a complete story, but leaves a lot of obvious plot hooks dangling. It's only a couple of hours long (my first time through took about two and a half hours; the second time through was under an hour and a half) and it's free, so give it a try.

And do say hi to Susie.