Title of the Study English: DOTA 2: A Comprehensive Database Institution depositing the data Institute of Sociology, University of Zielona Góra Principal Investigator Justyna Nyćkowiak, Institute of Sociology, University of Zielona Góra The purpose of the study The project focuses on the phenomenon of professional video game playing, especially e-sports. This activity is treated in the project as a new professional activity, especially popular among young people. The project collects data describing objective dimensions of professional career and uses conceptual frameworks of various disciplines. They are collected to analyze professional development strategies in e-sports, making individual choices, patterns and professional paths adapted to intensive social and technological changes. The data describes the career paths of people who not only represent a professional level of skills in e-sports but also have soft skills that enable conscious and thoughtful management of professional career paths. Main topics of the study e-sport, professional career, career in sociological perspective, e-sports players’ careers, DOTA 2 Unit of analysis Professional e-sports DOTA2 players’ Data collection methods The main sources of data professional e-sports DOTA2 players are different online sources to create consistent and reliable websites: https://liquipedia.net https://www.dotabuff.com https://www.opendota.com http://www.datdota.com Sample design The data encompasses the professional careers of about 350 individuals - data for all players who had participated in at least one of the seven editions of The International (2011–2017) or one of the four official Dota 2 tournaments organized by Valve, which had achieved major tournament status. Ddemographic distribution reflects the global nature of professional Dota 2 esports, underscoring geographic diversity in the competitive scene. Geographical coverage Global Fieldwork Dates (start and end) Fieldwork to collect data was conducted from 2017 to 2019. Generally accessible publications that refer to this data Nyćkowiak, J. (2018). Playing Dota 2: professional careers in e-sports. Rocznik Lubuski, 44(1), 145-159. Kołodziej, T., & Nyćkowiak, J. (2018). Zróżnicowanie narodowościowe zespołów e-sportowych,[w:] Transgraniczność w perspektywie socjologicznej. Europa–podzielona wspólnota, 201-216. Kołodziej, T. (2019). The influence of players’ nationality on the effectiveness of eSports teams based on the example of The International DOTA 2 tournaments. Review of Nationalities, (9). Nyćkowiak, J., Kołodziej, T., & Jasny, M. (2021). Social and cultural determinants of e-sports. Rocznik Lubuski, 47(2), 18-22. Nyćkowiak, J., Kołodziej, T., Jasny, M., & Siuda, P. (2023). Toward successful Esports Team: How does national diversity affect multiplayer online battle arena video games.