Wait, really? I've just checked the license for Red Eclipse itself, as well
as the content. Both are under free licenses: the engine itself is under a
variety of different free software licenses, and the data is under Creative
Commons/other free licenses licenses (BY, BY-SA, OFL).
You're welcome to correct me on this, however. It's available in Fedora's
main repositories.
If not, that really sucks! This is probably one of my favorite games, and for
the longest time, I thought it was free...but I'll have to remove it!