Separately, a new type of online game came to popularity alongside "World of Warcraft", "Defense of the Ancients" (2003) which introduced the multiplayer online battle arena (MOBA) format. "DotA", a community mod based on "", gained in popularity as interest in "World of Warcraft" waned, but since the format was tied to the "Warcraft" property, others began to develop their own MOBAs, including "Heroes of Newerth" (2009), "League of Legends" (2010), and "Dota 2" (2013). Blizzard Entertainment, the owner of "Warcraft" property, released their own take on the MOBA genre with "Heroes of the Storm" (2015), emphasizing on numerous original heroes from "Warcraft III" and other Blizzard's franchises. By the early 2010s, the genre has become a big part of the esports category.