Black Desert! Every time I learn more about it it moves up a spot or two on my must-play list! The sandbox title's Korean beta has started, and according to a post at MMOcast, testers can expect plenty of hands-on with questing, combat, housing, guilds, trading, "NPC relations," and PvP and sieging.
The site also has a few gameplay videos that are worth a look. There's footage of the fishing and jumping systems, questing stuff, and the opening cinematic. See for yourself after the cut.