Greetings, Rune Hunters.

We would first like to sincerely apologize for the inconvenience caused to your gameplay.

We are currently fixing the issue of UNDECEMBER not being playable on Galaxy S24 Ultra.

Here are instructions on how to play UNDECEMBER on Galaxy S24 Ultra before the fix is complete.

Please see below for more details.

How to Run UNDECEMBER on Galaxy S24 Ultra

- Main Screen [Settings] > [Graphics] > [Functionality Settings] > Change [Vulkan] to 'X' > Exit and restart the game (Edited on Jan. 31 17:47 (UTC+9))

We apologize again for the inconvenience this issue caused.

We will always strive to maintain the quality and reliability of our services.

Thank you.