Irth Online is a virtual world in which players role play characters in a free form, fantasy-based storyline. Players join Irth's history at a period when a fragile truce exists among the far flung civilizations of the snowy Arcadians in the north, the southeastern swamps and marshes of Morbus, and the southwestern tropical region of Mezoteks - and determine the course of history for each civilization.
Irth Online's advancement system has a unique skill-over-time feature, allowing all characters to enjoy adventures together, regardless of experience level. Player battle and fighting include PvE (Player vs. Environment) and PvP (Player vs. Player). Opportunities for non-warfare gameplay are also offered, along with safe areas for peaceable players.