Cooperative Mode was one of the gameplay modes in the Heroes of the Storm closed beta. Here, a player (and if desired, friends) could play against AI-controlled opponents. If no-one is on a friends list, the player is paired with other human players using the game's matchmaker. Along development, the AI difficulty will be designed to match the players' skill. The players are chosen prior to entering the matchmaking service. After playing the game, other players may be invited to join a party list.
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