Star Trek: Starfleet Command: Volume II - Empires at War picks up where the original Starfleet Command left off. The Organians have returned after their mysterious absence in the original storyline, and they've brought the Interstellar Concordium (ISC) to forcefully pacify the leading races in the area. Their ships, like those of the Romulans and Gorn, specialize in plasma torpedoes. The Mirak Star League (known as the Kzinti in the original Starfleet Battles board game), mortal enemies of the Lyrans, have also appeared, bringing their missile-equipped ships into combat.
The original six races from the original are back, with some additions to their arsenals. Most notable is the inclusion of fighters to non-Hydran races, and special carrier ship types which house them. New weapons are available for certain races, and a new anti-missile defense weapon is given to all races to expand defense against missiles from prior options of tractor beams and phasers. The campaign's setting has been remade from the ground up into a hex-based map, and a full Dynaverse is included as a dynamic mission generator.
If you order this title directly from Interplay, you get a "bonus mission CD". However, this CD does NOT work without obtaining another patch from Interplay due to a change in the mission file structures before the game went gold.