Dungeon Siege is an action role-playing game set in a pseudo-medieval high fantasy world, presented in 3D with a third-person virtual camera system under the control of the player, in which the player characters navigate the terrain and fight off hostile creatures. The player chooses the gender and customizes the appearance of the main character of the story prior to the start of the game and typically controls them. The main character is joined by up to seven other characters, which are controlled via artificial intelligence; the player may switch which character they are controlling at any time. The other characters move in relation to the controlled character according to the formation and level of aggression towards enemies chosen by the player. The additional characters can be disbanded from the group and re-recruited.