First revealed in mid-2018 at San Diego Comic-Con, War for Cybertron: Siege, in keeping with the installments of the Prime Wars Trilogy, features a line-wide gimmick: weaponry. Deluxe and Voyager Class figures each come with at least two weapons that can combine and be placed into any C.O.M.B.A.T. posts, 5mm posts littered all over their bodies. Another line-wide feature are battle-damaged paintjobs to fit with the "war" aspect. Returning to this toyline are Micromasters which are bundled in two packs and are now able to combine into large weapons along with their vehicle form. Replacing the Prime Masters from the last toyline are "Battle Masters", small Targetmaster-type figures that can combine with other weapons and figures. They include additional effect pieces, called "Fire Blasts", that can be placed onto other weapons included with other size classes, as well as hardpoints on the figures themselves to simulate being 'shot' or on the back of vehicles to show speed. Some Deluxe Class figures are classified as a "Deluxe Weaponizer" meaning they can break apart into multiple weapons to be used in the C.O.M.B.A.T. system.
