The new Fallout-themed LTM, Project RADS, just started in Black Ops 7 Zombies with Season 1 Reloaded, and it has a special Easter Egg that spawns a powerful boss named the Irradiated Deathclaw.

https://www.sportskeeda.com/call-of-duty-game/how-spawn-irradiated-deathclaw-fallout-easter-egg-black-ops-7-zombies

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