One of Star Chamber’s primary distinctions is that it combines traditional CCG elements (card collecting and trading, deck building, the use of cards in-game, etc.) with a board wargame-style map and unit production based on locations on that map, in some ways similar to the classic Master of Orion series. There are 43 unique maps, with random elements incorporated into some of those maps. The titular Star Chamber is a location at which voting session between players’ citizens takes place every sixth turn. Players vote for the Power Play, Alien Support, and Peacekeepers (see Voting below).
There are three ways to win a game of Star Chamber: Military Victory (conquering the opponent’s homeworld), Cultural Victory (having a “destiny point” advantage of 30 or more points; destiny points are generally gained by controlling “artifact planets”), and Political Victory (winning three Power Play votes).
Source: Wikipedia, "Star Chamber: The Harbinger Saga", available under the CC-BY-SA License.