Release Date: April 28th. Free to play. (March 29th for Founders Access)
Where: Steam.
Style: Korean MMO Grind + Loot.
Art: 3D World with animated sprites.
Gameplay: ARPG-ish. 80 classes. 200 bosses. Focus on collecting/leveling over questing. Great stat customization/slotting. Hats.
Cost: Free to Play with Early Access founders packs and microtransactions.
Story: Uh well ya know. There is a tree... you see. It just showed up one day and now there are monsters. Oh, and the Goddess watching over everyone has vanished too. None of this matters. Go get loot.
Players are calling this the true spiritual successor to Ragnarok Online. Tons of classes and tons and tons of items. Farming up things and killing bosses for loot. Not to mention everything is SUPER ADORABLE. Also hats. Everyone loves hats. If you've ever wanted to wear a stop-sign on your head while stabbing cute blobby bunny rabbits in the face until they explode with loot; this game might be for you.
http://www.tosbase.com/ is the best resource for info right now as the game prepares to launch.