Wonderland Online has recently update with a brand new version, adding in new quests, a drastic change to the current storyline, and the ability to hold instances in their game. With all of these additions comes their new 13 dungeons, the wings of the Cursed Palace.
The former Hell Generals of the evil King Howert (now deceased as of this patch) have captured Apollo, the Sun God, forcing the world into eternal darkness. Players will have to pass the tests of the Cursed Palace, a place that only Hercules had survived before, to reclaim Apollo and bring light back to the world. If you haven't noticed, this entire patch has a very Greek theme to it, introducing the Greek Polis area, which is a combination of all of the old Greek city-states, and the Hanging Gardens of Babylon in addition to the Cursed Palace.
For the full look at the 2-D MMO's large patch, check out their dedicated site to the update on the main Wonderland Online home page.