Wing Commander Saga is a free game based on the Freespace 2 Source Code Project. It is based upon the popular Wing Commander series by Chris Roberts and Origin, and features a new story line during the final portion of the Terran Confederations deseprate fight for survivial against the Kilrathi Empire. You assume the role of 2nd Lieutenant David Markham, a recent OCS graduate in an accelerated flight training program. Victory and survival for humanity can only be bought at a terrible cost. Gather your wingmen and your courage and prepare to play your part in humanity's desperate gambit as you face the Kilrathi foe. It is a time where even average men must reach inside themselves and become heroes. Answer the call. Face the enemy. Make your mark as the Confederation faces its darkest dawn.
WC Saga is quite a hardcore game with several missions where you must quite quickly figure out what to do or die. Many times.