Resident Evil 4 is the sixth installment in the Resident Evil series and is often noted for its departure from the fixed camera angles of earlier titles. It introduced an over-the-shoulder third-person perspective, faster-paced gunplay, and more dynamic controls. The game features larger, more open environments and a new AI system that enables enemies to coordinate attacks and attempt to corner the player. Enemies exhibit more human-like behavior, such as climbing ladders, opening doors, and using weapons.