When playing Metal Gear Online, Mei Ling had a unique quote (when the player types in <UNI01>). She states a famous Shakespeare quote: "...the tongues of dying men enforce attention like deep harmony. Where words are spent, they are seldom spent in vain." In addition, she was also a playable character of sorts in the MEME expansion. Although she herself had a limited array of weaponry that restricted her to handguns, she was capable of using the Soliton Radar to spot enemies hiding behind areas, and then supply the information via SOP. She couldn't use CQC, but could charm nearby enemies with her "Salute" ability. In addition, because of her status as the captain of the USS Missouri in the main game, she was also capable of launching a missile strike on enemies from the USS Missouri on an area that she designated. Her cap was also a bonus head equipment for a character. If tranquilized, she'd sometimes says "I... just can't stop..."