Montages featuring players from the club's successful era in the 1990s, signed jumpers, as well as electrical equipment from the players' own common room went up in the blaze, which is currently being investigated by the police arson squad.
While the club's premiership cups, which are kept elsewhere, were not harmed, Kangaroos football manager Tim Harrington said the players were most upset about losing the montages.
"Every player who played a senior game in that year in '96 and '99 were sort of a huge montage that was put together by the club and once they were used for that year they got relocated to the players lounge so the players are quite upset that those have been lost," Harrington said.
"The montages, jumpers, awards that the players had done themselves and the club had presented to different players, they're the things that we can't replace; the rest of it is probably replaceable."
Items from the players' room, for which they had paid for themselves, had also been destroyed.
"The players made a real special effort to do that area up themselves, painted themselves, did the work themselves, provided the billiard table, the table tennis table, the televisions, the entertainment system, all of those sorts of things have come from the players' own pockets," Harrington said.
"So for them to do all that work and then for it to be taken away from them individually is pretty tough."
However, Harrington said the players were largely unfazed by the fire and had already initiated their own contingency plans.
"The players are already making decisions about what they're going to do just to make sure that they're spending time together so if we are at a different venue and we're not training and they haven't got their common room available that they'll meet somewhere else," he said.
"We can always rely on our players to do that sort of stuff. We're very lucky so I'd be surprised if it didn't have more of a galvanising affect."
