Rock 'n' Roll Escape

Find a way out. Use your wits to solve puzzles.

This was the best concert ever. People were jumping and singing. At one point, it got so crowded that people began to push. I felt a strong blow to the back of the head and fell unconscious. When I woke up, everyone was gone. To make matters worse, I was locked on the outside. Now I have to find a way out.