Shadowbane

Shadowbane is a free, historical, open-world MMORPG set in the dark fantasy world of Aerynth. The game offers extensive character creation, various character classes, and a grind-heavy experience system. It supports both co-op and PvP gameplay for up to two players, though it was originally designed for a larger multiplayer experience. The game officially closed in 2009, but it may still be accessible through private servers and communities.