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. Most Deluxe, Voyager, and Leader Class figures each come with at least two weapons that can transform, combine, and/or be placed into any C.O.M.B.A.T. System posts, 5 mm posts littered all over their bodies, essentially an updated version of the Powerlinx system. Another line-wide feature is battle-damaged paintjobs to fit with the gritty "war" aspect. Returning to this toyline are Micromasters, which are bundled in two packs, replacing the Legends Class of the last half-decade, and are now able to combine into large weapons as well as transform into their vehicle form. This size class is also used for Soundwave's minions, who can turn into cassettes or be used as a shield with fold-out pegs. 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 "Fire Blast" effect pieces 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 simulate "rocket boosters" or "speed", depending on the effect part. Some Deluxe Class figures are classified as "Deluxe Weaponizers", which can be disassembled into multiple weapons to be used in the C.O.M.B.A.T. System. Leader Class figures are very similar to Power of the Primes, in which smaller figures come with additional armor that can be be added to vehicle mode or robot mode to increase their size to become the height of a Leader Class figure.
