I get no search results on SimHQ so...
"The Babylon 5 Space Combat Simulator begins on the third anniversary of the Interstellar Alliance — two years after the end of Season 5. Aside from one brief conflict with the Centauri Republic early in its first year, ISA President John Sheridan has delivered on his promise to keep the peace among its member worlds."
"But behind the scenes, away from the bright lights of news hover-cams, trouble is brewing. Races that have been at peace during the last two years are starting to fight over borders and the rights to new technologies. Random attacks on shipping lanes are growing in number. There are troubling reports of powerful, unidentified warships near the rim. It could be nothing at all—paranoia because things have been going along so well? Or it could be exactly what it looks like... trouble."
Work on this game ended on September 21, 1999, when, as part of a corporate reorganization, Sierra cancelled it and laid off its development staff when the game was only a few months away from release.[5] This game was to have cast the player as the pilot of a Starfury fighter craft, giving the player an opportunity to "move up through the ranks," and eventually take command of capital ships and even fleets. Christopher Franke composed and recorded new music for the game, and live action footage was filmed with the primary actors from the series.[3] Some of Franke's music for the game was included on a separate disc that came with "The Official Guide to Babylon 5 (CD ROM)", also published by Sierra.
I found a link to a playable ISO from an old E3 Tech Demo.
