Riot Games ResearchOverview OverviewRiot Games is an American video game publisher Riot Games is an American video game publisher that was established in 2006. Their main office is that was established in 2006. Their main office is based in Santa Monica, California. They currently based in Santa Monica, California. They currently have additional offices located in Saint Louis, have additional offices located in Saint Louis, Moscow,Dublin Moscow,Dublin, Seoul, S , Seoul, Sa ao Paulo, o Paulo, Ist