Scary Teacher: Bad Students 21 is an iPhone game developed by XTERIO STUDIO. This free game falls under the category of Games and offers an immersive experience in which players get to play pranks on a scary teacher.

In Scary Teacher: Bad Students 21, players find themselves in a school setting where they have the opportunity to take revenge on their creepy granny teacher. The game features a story-based gameplay with various challenges and tasks to complete. Players can prank the school teacher, explore the school hostel, ride a cycle from the hostel to school, and witness the teacher punishing kids.

The game boasts strong AI, making the scary teacher intelligent and capable of catching players if they are not careful. Players must complete missions and tasks without getting caught within the allocated time. The game features high-quality 3D graphics, easy and smooth controls, and an open-world style interactive school environment.

If you're looking for a scary adventure and real-time horror fun, Scary Teacher: Bad Students 21 offers a thrilling experience where players can take revenge on a scary teacher. Get ready for a spooky prank-filled journey in this horror survival game.