GC never had flagship battles.
GC had an equivalent to Taloraan with asteroids.
Canadiens made a map that had some of the largest ships together in one map, but afaik they were not boardable and were not detroyable. They had lots of pretty lasers and explosions firing off everywhere though.
"Munchkin: One who, on being told that this is a game about politics and intrigue in 17th century Italy, asks to play a ninja."—
Andrew Rilstone