Grey Cloud (Matokan Sioux Mahpiyagohta), better known as Nightwolf, is a character in the Mortal Kombat fighting game series. A powerful and respectful warrior of the Matoka Tribe, Nightwolf has been a supporting character to the series as well as becoming one of the most prolific Native American characters in video games. Nightwolf made his playable debut in Mortal Kombat 3 and has been a recurring character since. Nightwolf returned in Mortal Kombat (2011) again as a playable character while having a supporting role in the game's Story Mode. Nightwolf returned in Mortal Kombat 11 as a DLC character, being the second character available in the Kombat Pack. He later gained a role as one of the protagonists of the Aftermath Story Mode expansion.