The objective of this project concentrates on the game Defense of the Ancients 2 (Dota 2). In this game, players are constantly striving to improve their skills, which are fueled by the competitive nature of the game. The design influences the community to engage in this interaction as they play the game cooperatively. This thesis illustrates the importance of player interaction in influencing design as well as how imperative design is in affecting player interaction. These two concepts are not separate, but are deeply entwined. Every action performed within a game has to interact with some element of design. Both determine how games become defined as competitive, casual, or creative. Game designers can benefit from this study as it reinforces the basics of developing a game for players to interact with. However, it is impossible to predict exactly how players will react to a designed element. Designers should remember to tailor the game towards their audience, but also react and change the game depending on how players are using the elements of design. In addition, players should continue to push the boundaries of games to help designers adapt their product to their audience. If there is not constant communication between players and designers, games will not be tailored appropriately. Pushing the limits of a game benefits the players as well as the designers to make a more complete game. Designers do not solely create a game for the players. Rather, players design the game for themselves. Keywords: game design, player interaction, affinity space, emergent behavior, Dota 2