PurposeEsports is rapidly growing in popularity and viewership. The study's purpose was threefold: (1) to provide a systematic review and synthesis of esports spectatorship research. (2) to provide a reference for the psychology of consumer behavior in esports live streaming and esports event attendance. (3) to deliver a clear picture of the factors that impact consumer behavior in esports online and on-site consumption.Design/methodology/approachThe study systematically reviews motivational aspects of online and on-site spectatorship using the Preferred Reporting Items for Systematic Review and Meta-Analysis Protocols (PRISMA). SCOPUS and Google Scholar were selected as social science databases. Twenty-five papers met the inclusion criteria: (1) published between 2000 and 2022, (2) empirical investigation, (3) focus on online and/or on-site esports spectatorship/events. Five papers implemented randomization to assess common method bias.FindingsTwenty-five papers qualified for subsequent analysis. The papers were mostly quantitative. They included a theoretical framework and investigated online esports spectatorship. Significant antecedents for motivation to watch esports online and/or on-site were fanship, tension release, entertainment, escaping everyday life and unique features like chat and direct communication. No consensus was found concerning similarities or differences between online and on-site esports spectatorship and traditional sports spectatorship.Originality/valueThis research contributed to a new theoretical, methodological and practical agenda. A more comparative approach analyzing contextual, structural and demographic cues could lead to a holistic picture of esports spectator motivation.