gametestlab.com

Siege sees a lone AI-controlled rookie BSAA agent in trouble and in need of help. Players will split into two teams with one assuming control of enemy creatures who are trying to take down the rookie, while the other team selects playable characters from the main game and must keep him alive. Each game consists of two rounds with teams switching between the human and enemy roles. The human team wins a round if the BSAA agent survives, while the enemies win if they can defeat him.