Das Tal is a "fast-paced" sandbox that includes open PvP, full looting of players' corpses, a classless character system, and a constant struggle over resources and player settlements. Probably the most interesting aspect of this MMO is that each server will eventually reach a "climactic end event" and then restart, allowing players to vote on the rules and features for the next iteration.
Das Tal is on Steam Greenlight, is currently in the pre-production stage, and will most likely be doing a fundraising campaign at some point. We've got a teaser trailer for you with the creepiest voice-over ever after the break.
[Thanks to Skurvel for the tip!]