Ryzom is a science-fantasy MMORPG released in 2004 by the French studio Nevrax and now owned by Winch Gate. Its code has been open since 2010, making it one of the few commercial MMOs that is open source. It is set on Atys, a planet-sized tree where four homin peoples rebuild after an invasion of insect-like Kitins.
There are no classes: you level fighting, magic, crafting and harvesting separately, and actions are assembled from parts, so you can tune a spell or attack yourself. Hidden resources must be prospected, sometimes as a team, and material quality shapes the finished item. Seasons and weather change the world, and animals move in herds and hunt in packs.
It suits roleplayers and crafting fans. The graphics are dated, and free accounts stop at level 125.
