“…Points [22], [25], [26], [28], [29], [30], [32], [35], [36], [43], [44], [46] Badges [22], [25], [27], [28], [29], [30], [32], [35], [36], [43], [44], [46] Levels [22], [26], [27], [32] Challenges [3], [23], [36] Competence [3], [23], [25], [26] Cooperation [28], [45]…”