I don't really play that many video games, but sometimes you've just gotta take a look at something as you're playing and just kinda bask in it. It's art, no question for me.
Limbo and Deadlight are a couple I've played lately that have really stuck with me;
^ It's something about a picture of someone or something silhouetted against a stark, bold background that just gets me every time.
Going way back, hand-drawn backgrounds from Final Fantasy IX take a lot of beating too. Really does a lot to bring out a more archaic, storybook-type atmosphere, which really gives that game a lot of character and atmosphere;
