why backpack was added to Dota 2

Submit clips: Dota 2 is a multiplayer online battle arena (MOBA) video game in which two teams of five players compete to destroy a large structure defended by the opposing team known as the “Ancient“ whilst defending their own. As in Defense of the Ancients, the game is controlled using standard real-time strategy controls, and is presented on a single map in a three-dimensional isometric perspective. Ten players each control one of the game’s 124 playable characters, known as “heroes“, with each having their own design, strengths, and weaknesses. Heroes are divided into two primary roles, known as the core and support. #dota2 #dota