Siege Mode is a game mode in S4 League, introduced during the Iron Eyes Update. In this mode, the player's objective is similar to Domination in many video games, and to games involving 'capture the flag'. There are three bases within the map, known as "cores". Usually the bases are at equal distances from each team's spawning area, most likely for the fairness of both teams. To conquer a base, the player has to remain stationary for a certain amount of time on the base until the base's perimeter turns a green colour. When the base is captured, many bonus items spawn from the base's center, which can be collected by members of either team. These items include: