The best RPG ever created outside of Final Fantasy VII
Another good thing about the way in which it allows you to play is that it constantly keeps you guessing in the fact that there are always some kind of new but not repetitive problem, such needing a ship and having to capture/re-capture the ship-yard or an ambush in front of the enemy base
Also it has the easiest to understand multi-player hot-seat system I've come across in a long time which goes to show that no matter how good you want games to be, there'll always be an old one with a feature you can't beat.