Freespace has certainly been the most satisfying space sim/arcade shooter/explosions gallery I've ever played. It's just filled with all those moments that make a game for me. Diving out the way of the scariest looking ship I'd seen in a long long time, evading waves of flack and beam fire to drop that killing blow, frantically fighting off hordes of bombers and intercepting those devilish warheads, watching a vast warship the size of a small continent getting oblitterated by one the size of a planet. Don't get me wrong, there are some good games out there (The X-wing series always has a place in my heart), but FS for me, is hands down, the best.