Phantasy Star Online 2 will launch in North America and Europe in early 2013, SEGA has announced.

The free-to-play MMO will launch on PC over a decade after the original Dreamcast hit, and feature 'revolutionary' real-time combat and a flexible class-based levelling system.

Three races will feature initially, including humans, 'spiritually-powered' Newmen, and the artificial CAST, and SEGA promises that quests will be unique to each player thanks to the game's randomised dungeon maps.

"Phantasy Star Online was a revolutionary game when it was released, and we want to make sure that its successor in the series is every bit as ambitious," said Chris Olson, Vice President of Digital Business at SEGA of America. "We look forward to introducing Phantasy Star Online 2's unique, easy-to-access multiplayer action to the rest of the world next year!"

"The number one thing we want to provide players in Phantasy Star Online 2 is an adventure that changes every time they log in," added Satoshi Sakai, Phantasy Star Online 2 Producer at SEGA of Japan.

"Just as great table-top RPG experiences revolve around imaginative and unexpected encounters, we want players to consistently be surprised as they explore dungeons and undertake quests."

Phantasy Star Online 2 went live in Japan last week. A PlayStation Vita version is also expected to release during 2013.