This work is related to the research line teaching argumentation, focusing on argumentative skills and linking serious online games. The objectives were: first, to explore a serious online game for teaching the basic argumentative skills. Second, observe the students' progression in the mastery of such skills when they interact with the game. The mixed exploratory case study was adopted as a method, with students from the penultimate grade of secondary education in a Colombian state school. One of the most relevant results was that 61, 36% of the students improved their level of proficiency in at least one of the skills observed.