This presentation proposes to challenge one of the criteria proposed by Roger Caillois to define both play and game. This criterion is the 4th in relation to unproductivity. Based on the Datagame, a game category belonging to the Serious Game, we propose to demonstrate by a hypothetic-deductive approach our breaking with this fourth criterion. The key to the demonstration lies in the exploration of the concept of Datagame and the identification of associated sub-categories.