Treasure accumulated over time can be spent on upgrades for the tower, whether they're upgrades for gameplay or just decorative, along with large contraptions and magical objects that the minions can be ordered to return to gates, thus the tower. The choice system returns once more in "Overlord II", where at certain points during quests that can be taken providing two paths; the Destruction Overlord that focuses on destroying towns and killing all in his path and the Domination Overlord that rather focuses on enslaving defeated foes or neutral parties to worship and work for him. The choice themselves not only affect the story and interactive with non-player characters, but can alter the look of the Overlord and allow certain powers to become available. Other choices such as choosing a mistress allow the Overlord to have multiple mistresses and can (re)designate any to be the primary mistress at any time. Besides the single-player campaign, players can play various multiplayer modes online and local, both competitive and cooperative. Competitive modes includes Dominate, where rival player Overlords attempt to capture sections of the map, and Pillage where they must capture large portions of treasure. Cooperative, on the other hand, sees player Overlords working together to either defend against a constant onslaught in Survival or attack powerful foes in Invasion. The silent protagonist Overlord from the first game is not present in "Overlord II", as he was trapped in the Abyss dimension at the end of the expansion, "". Instead, the role of the Overlord is taken up by his child, who was removed from the original Tower to live in a mountain village, but is thrown out by the villagers to appease the Glorious Empire and, on his escape, taken in by the Minions. Gnarl, the aged Minion advisor from the previous games, is the main recurring character in "Overlord II". As an adviser and initial tutor, Gnarl engages in most of the game's dialogue, including narration, outlining objectives, dropping hints and even making jokes. Other Characters returning from "Overlord" include Forge Master Giblet, the minion minstrel Quaver, and the human Rose, mistress of the previous Overlord. With the new Overlord comes the familiar gaggle of minions, grouped into four different sects that have different abilities and strengths: Browns; Reds; Greens; Blues. The Browns are the first sect that the Overlord has at his disposal, and frequently the most useful in any direct combat; they are more robust and can take much more damage than any other minion group, though they are susceptible to fire and poison and they drown in water higher than the Overlord's knee.