You're going to finish Elden Ring, a message box pops up at the end of the credits:
"Hi, I'm Miyasaki. The producer of this game you just finished. If you enjoyed the experience we crafted for you, please consider tipping the developers & me for our work."
Then several dialogue boxes pop up with a 10%, 15% & 20% tip option. If you select "no tip", they don't let you start a new game until you authenticate your account online to bypass it, but you had to make an email with Namco first.