NHN Corporation has released the open beta client of Karos Online, a new free-to-play fantasy MMORPG developed in Korea by Galaxy Gate and due to launch in Europe later this year. In Karos Online, players take the role of a hero determined to defeat the curse of darkness falling over the world of Asmara, and ascend to ultimate glory by becoming the mythical Karos warrior. Through questing, guild clashes and mass PvP, they enter the fight for domination over the world's vital energy source, Fletta. Fletta gems provide the basis for the game's unique and complex alternate progression system; alongside traditional leveling within the game, Fletta energy can be used to increase stats, give buffs, buy resources and enchant items. In related news, NHN Corporation announced several in-game events, celebrating this open beta which starts this Friday, the 4th of December.