A pin-up is an attractive man or woman who appears on posters, often wearing very few clothes.  (Image for illustration only from FB page Pin-up Models) British definition says as per Collins: a picture of a sexually attractive person, esp when partially or totally undressed 

A pin-up model is a model whose mass-produced pictures and photographs have wide appeal within the popular culture of a society. Pin-up models are usually glamour models, actresses, and fashion models whose pictures are intended for informal, aesthetic display, such as being pinned onto a wall.

Call of Duty: Black Ops Cold War (2024)\n\n Set in 1981, you team up with characters from previous games, including Alex Mason, Frank Woods, and Jason Hudson. Under CIA's Russell Adler, your elite team is supposed to catch a Soviet figure that goes by Perseus  who is planning to attack the United States.

As the name suggests, the events of COD: Black Ops Cold War take place during the Cold War. More specifically, the entire campaign occurs in 1981 and sees the return of some characters from the first Black Ops.