The popular mobile strategy game Marvel Strike Force has announced a massive update to celebrate its one-year anniversary, with a new game mode and characters under the title "Alliance War."

The update includes new opportunities for players to compete against each other, as they attack rival Helicarriers with teams of Marvel heroes and villains they have unlocked for big reward bonuses. The trailer for the new update is below:

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As part of the update, four fan-favorite characters from Black Panther are available to unlock, each with their own special abilities. The new characters include Killmonger, Shuri, Okoye and M'Baku. Killmonger will be included with the initial Alliance War update while Shuri, Okoye and M'Baku will be added to the roster soon thereafter.

First released in March 2018, Marvel Strike Force has players run their own Helicarrier either as part of S.H.I.E.L.D. or Hydra. While upgrading their vessel, they compete against other plays with heroes and villains they have assembled for reward points earned in competitive squad-centric battles.

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Developed by FoxNext, Marvel Strike Force is available on iOS and Android devices.