Plague Sieges and Plague Emergencies return as a Halloween treat.
Sci-fi MMORPG's first major DLC includes new missions, weapons and a four-player vehicle.
13 episodes ordered by Syfy after record breaking debut.
Contest runs from April 30 to May 10.
Warner's first No.1 since LEGO Batman 2.
Tomb Raider holds at No.2 for a fourth consecutive week.
Trion Worlds' Defiance is new at No.3.