"Applause" sign blinking
Big props to Ubisoft's latest announcement: All in-house developed titles to have subtitles. I'm not deaf, but I do have bad hearing, and often times poor audio engineering or the use of spacial audio (3D sound that tapers in volume as its source goes farther away) prevent me from following with the dialogue. I always first go to the option menu of a new game and check to see if I can turn on subtitles.