Saga of Ryzom went open source with creative commons assets. https://en.wikipedia.org/wiki/Ryzom#Source_code_and_assets_freely_released https://en.wikipedia.org

Saga of Ryzom went open source with creative commons assets. https://en.wikipedia.org/wiki/Ryzom#Source_code_and_assets_freely_released https://en.wikipedia.org/wiki/Ryzom#Source_code_and_assets_f... Tho on second thoughts I think the server side quests and world map may not have been released, so it probably does not count.