As a pilot for the Galactic Terran Alliance, you are no stranger to war. But when racing through space to engage your new enemy for the first time, you sense something different. Suddenly, darkness blankets your craft. Your stomach sinks as your eyes pan across the Shivan flagship's massive body. Then it begins. Swarms of fighters pour from the belly of the flagship and scream towards you. You're about to discover everything you thought you knew about space combat -- just changed

Freespace is not related to the Descent series despite the similar name.