[PC, Steam] Free: Black Desert (Was $13) @ Steam

Played by over 20 million Adventurers - Black Desert Online is an open-world, action MMORPG. Experience intense, action-packed combat, battle massive world bosses, fight alongside friends to siege and conquer castles, and train in professions such as fishing, trading, crafting, cooking, and more!

59,196 mostly positive reviews.

Also free on their own site.

via Hiphopopotamus at OzBargain