video game, Call of Duty: Black Ops, zombies mode, undead enemies, survival gameplay, cooperative multiplayer, iconic maps like Kino der Toten, Nacht der Untoten, weapons arsenal, mystery box, Pack-a-Punch machine, power-ups, perks, round-based waves, barricades, strategic defense, dark atmosphere, eerie soundtrack, first-person shooter, intense action, console, PC gaming, detailed textures, dynamic lighting, immersive experience.