easter eggs, Call of Duty: Black Ops Cold War, offline mode, solo player, hidden content, secret challenges, thematic decorations, pastel colors, bunny motifs, egg hunt, festive atmosphere, game map, interactive objects, puzzle solving, reward unlocking, limited-time event, playful graphics, immersive gameplay, ambient sound effects, dynamic lighting, first-person perspective, action-packed, Easter-themed skins, collectibles, in-game surprises, covert operations, military gear, Easter baskets, spring season, joyful music, special effects, engaging Easter missions, offline Easter egg hunt.