I have several A-H and early SPI games stuffed away in my closet. I really should get into online play of that stuff.
Then, several years later, another group spent a lot of time and money trying to upgrade it into a realy slick, modern computer game with a lot more naval war media (videos, etc.)...but it never got complete and they went out of business.
The community never gave up and now Matrix Games has the upgraded Harpoon III and the new Commander's Edition of the original game available in this Ultimate Edition. I got it...and love it.
Always favoured Twilight 2000, myself. Alas, events overtook it.