I tried to find python-fife in Synaptic, but could not. I'm not really
familiar with Synaptic so I might have done something wrong.
I read Unknown Horizons' Wikipedia page; it says that the game uses the
"Flexible Isometric Free Engine." That abbreviates to fife! I guessed that
maybe python-fife is not a pre-installed package in Trisquel because fife's
Wikipedia page has a picture of the game Unknown Horizons. So I tried
installing python-fife in the terminal and got this message:
Package python-fife is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source
E: Package 'python-fife' has no installation candidate
I feel like a detective =)