" They say that fewer than a dozen human beings alive today understand the inner workings of the hyperdrive."
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This mysterious box sits quietly at the heart of your ship, thinking its own inscrutable thoughts. When it comes time to travel between the stars it sets off a nuclear fusion reaction powerful enough to level an entire city, and then somehow tucks the resulting explosion in between the folds of regular space-time like a wasp stinging an oak leaf to lay her eggs inside. Your ship rides the resulting ripple in the fabric of space."
A hyperdrive is a very useful thing, because without one (unless you have a replacement, such as a scram or jump drive) you cannot move between star systems. It can however only move along routes between stars, unlike the Jump drive which is not limited to those routes.
Of these three FTL methods, the hyperdrive uses the least fuel.