Lineage 2: Revolution has been updated to include a pair of game modes to allow players to take on epic scale battles while on the go with a mobile device.
Fortress Siege is held each Friday and allows players to "enter a real-time, massive PvP battle between two clans". Each clan can field up to 50 members. Once crowned, a clan will take on a new opponent the next week as other clans bid for the right.
Open Siege is held on Tuesdays, Thursdays and Saturdays. Anyone level 11 and above can take part in 30v30 fights to provide a small taste of the larger Fortress Siege game mode.
In celebration of the Open Siege update, the schedule for Open Siege will be adjusted for the first week of the update: A total of five Open Siege will be held – Wednesday (December 13) and Saturday (December 16) on the first week, and Tuesday (December 19), Thursday (December 21), and Saturday (December 23) on the second week. Schedule will resume to every Tuesday, Thursday, and Saturday from the following week. (Schedule is subject to change with notice).
Learn more on the Lineage 2: Revolution site.