There are a few, actually:
- Ryzom:
- The Mana World: tmw package in Trisquel's repo
- Other games using the Mana engine (try ManaPlus from Trisquel's repo, the
manaplus package)
- Crossfire: crossfire-client package in Trisquel's repo
- Deliantra: http://www.deliantra.net/
- Stendhal: https://stendhalgame.org/
And there's a libre client for Ultima Online, Iris2:
http://www.iris2.de/index.php/Main_Page
I can't really vouch for many of these, mostly because I've only played two
of them (Ryzom and The Mana World), and at that not very much. I'm sure you
can do your own evaluation, though. :)
