The first Starcraft was already huge at least in Korea, and Doom / Quake were pretty big online in the 90s including some professional events: https://en.wiki

The first Starcraft was already huge at least in Korea, and Doom / Quake were pretty big online in the 90s including some professional events: https://en.wikipedia.org/wiki/Esports#Growth_and_online_video_games_(1990%E2%80%931999) https://en.wikipedia.org/wiki/Esports#Growth_and_online_vide...