an apparatus and method for effectuating multi - cycle engine braking is disclosed . the present invention controls the operation of the engine valves to permit more than one compression release event during a single engine operating cycle . the apparatus includes an assembly for operating at least one exhaust valve of an engine cylinder during a positive power operation . the apparatus further includes an assembly for operating at least one intake valve of the engine cylinder . the apparatus further including an assembly for operating the at least one exhaust valve during an engine braking operation .