Peria Chronicles is an open world MMORPG, which is set in the background of the war between human and monsters. Players' mission is to fight against the monsters in order to expel the beasts that disturbs human's social order, and players are more like watching an anime while playing the game. Designed using a self-developed engine, warm feelings of cell animation was bodied out; where players can interact with every single in-game objects. The 'Kirana' species whom you will encounter in the game can either be a life threatening enemy or your companion in battle by providing skills. Manage to overpower the enemies building your own.

There’s also a system in place which dynamically changes the size of the cities. For example, if a city gets more and more players it will grow considerably, while a city which is becoming deserted will become smaller and smaller until it eventually disappears from the map. Combat is fairly unique, sort of a mix between hack and slash and card games, with the cards used to summon the Kirana creatures, which you can buy or capture on the field. Some Kiranas may be combined to create an even more powerful creature.