Within the space of sports games, more particularly in the physical practices where participants interact operative way with others. This is particularly the case in team sports (football, basketball, volleyball, rugby, baseball, Futsal, Beach soccer...) or traditional Tunisian sports games (mini goals, 7 holes, elagfa,...) analysis by Allen Ali [1], during of which the players of a team communicate unambiguous with their partners but contre-communiquent not without malice with opponents. The purpose of our study is to show the effect of the specificity of the environment according to the rules of each sport Futsal and beach soccer on the certainty of decision-making during communications for inter and intra participated in competitive situations high level. The methodology used being an analysis of six matches, including three of the last World Cup of Futsal 2016 in Colombia and three of the last World Cup of beach soccer 2017 in the Bahamas. These analyses have come up as a result that the environment affects the shape of the sport as well as the practice environment is a determinant of practical identity during the decision-making process and affects the certainty of results.