The static client for x64 is perfect for you.
http://forge.ryzom.com/wiki/Linux_FAQ_EN#Ryzom_alternate_client
http://forge.ryzom.com/wiki/Linux_FAQ_EN#Ryzom_alternate_client
Ryzom alternate client
Static client, should work on any distribution, any kernel : 32 bits version or 64 bits version
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