I noticed that "Frogatto"( a 2d jump'n'run game) is part of the ubuntu and
debian repos, but not of trisquel.
The developers write on their website (http://www.frogatto.com/), that the
code is released under the GPL, but not the rest of the game (art & music).
Because of this, the main package of frogatto is in debians "contrib"
repository, because it depends on "frogatto-data", which is non-free.
I listened to many, many talks of rms and he mentioned very often (and I
agreed very often) that the art of a game is a different thing - it's not
necessary that this part of a game is free as well!
So in my opinion, the developers of frogatto do just the right thing.
It would be sad if the game isn't part of the trisquel repos because of
ethical issues.
Or are there some other reasons?