One of the more memorable campaign levels from Call of Duty: Black Ops Cold War is a largely stealth mission through East Berlin, set in February 1981.
In this level, you alongside your crack team of CIA operatives infiltrate the German Democratic Republic via train, and it's here you get a sense of developer Raven's attention to detail: there are era-appropriate ads all over the carriage, including an old-school FILA logo and a poster for an old camera, and a man reading a newspaper with a headline about then American president Ronald Reagan.
And there, on the wall by the carriage door, is a Doritos advert.