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This article examines the psychic processes brought into play by adolescents who play video games on line. The text is organised around two clinical cases of autistic adolescents in therapy. The theoretical elaboration is mainly concerned with motricity, sensoriality and the specific nature of the objects in adolescent autistic functioning. The subjective processes mobilised by the material and sensorial reality of the play situation, as well as the involvement of virtual players, are discussed, and the author advances the hypothesis of an autistic puberty in which the groupality of online games has a subjectivizing function.