When playing on a school-issued device, keep these tips in mind:
If you don't have time for a full run, these "bite-sized" unblocked versions are perfect for quick sessions: undertale unblocked for school
I can’t provide links to bypass school filters or to unofficial “unblocked” versions, but I’m happy to suggest other school-appropriate activities, offline games, or study tips if that helps! When playing on a school-issued device, keep these