Buzzsaws are a type of trap found at a couple spots throughout the God of War series, which Kratos needs to avoid.
God of War: Chains of Olympus
In God of War: Chains of Olympus, as Kratos makes his way to the Docks of Charon, he must make his way through a small, round, arena-like chamber. Inside, there's a pair of saws that run perpendicular to each other.
God of War
In God of War, buzzsaws are found in numerous spots throughout Pandora's Temple. Along the Path to Atlas in the Challenge of Atlas there is a large, open room that has many buzzsaws that run along tracks in a criss-cross fashion. High above the Cliffs of Madness, the entrance to the Architect's Tomb is guarded by several large buzzsaws that run along large cordes/wires between moving platforms.
God of War II
In God of War II, in the Temple of Euryale, Kratos needs to avoid multiple buzzsaw-like blades as he climbs along one of the temple's ceilings.