DarkEden is a isometric free-to-play MMORPG game. It's a hack-and-slash game, which requires the players to kill hordes of monsters in order to make their character progress.
DarkEden has a extensive player versus player system. You can choose between three races. Vampires, Slayers and Ouster. Players can be attacked without any restriction at any moment by other players except in a few safe zones.