Siege is a gametype present in Red Faction: Guerrilla.
Two teams take turns attacking and defending targets on a map. The attackers will use whatever tools at hand to tear down specific targets while the defenders use their Reconstructors to hold the line. The team that causes the most damage to the targets is the winner. 100 points is awarded to a team for each completely destroyed target, other points are awarded for the percent damage inflicted on the target. Points can be lost from the attackers total by the defenders rebuilding the targets with their Reconstructors, targets that have been completely destroyed cannot be rebuilt.