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Greg 'Ghostcrawler' Street

Greg 'Ghostcrawler' Street was the Executive Producer & Vice President of Untitled MMO at Riot Games.


Greg was previously research assistant professor before joining the world of game development. He got his start in the gaming industry as a game designer at Ensemble Studios, where he worked on titles including Age of Empires: The Rise of Rome, Age of Empires II, and Age of Empires III. He then joined Blizzard Entertainment, where he was the lead systems designer of World of Warcraft for several years.

Greg joined Riot in 2013 as the Lead Gameplay Designer for League of Legends icon League of Legends. As the lead designer, he provided the strategic direction and vision for League's gameplay and managed the designers working on everything from champion design to gameplay balance. He was then promoted to the position of Design Director where he worked with the other leads to help define the long term strategy for League of Legends and managed the narrative and design disciplines. Greg eventually moved off of League and became the Vice President of IP & Entertainment at Riot where his team worked on Arcane, Realms of Runeterra, Riot Forge, Tales of Runeterra, K/DA and the partnership with Marvel Comics.[1] On December 17th, 2020, he announced that he would be leading the development of an MMO set in the League of Legends universe.[2] In 2023, he announced that he would be stepping back from his role at Riot in order to be closer to his surviving family.[3]