The causes and consequences of climate change and environmental degradation have not been fully understood by a large sector of the population, resulting in a reluctance to perform mitigation actions. One possible strategy to encourage action is the implementation of gamified activities that connect the understanding of the global problems with actions that an individual can carry out in his daily life. This poster describes the preliminary experience of promoting the participation of first-year college students in the global web-based competitions One World Challenge and Project Green Challenge. The challenges' activities were carried out by students from Tecnológico de Monterrey, Campus Monterrey, Mexico, during the terms of Spring and Fall 2016, and were aimed at raising climate change awareness, and encouraging the adoption of sustainable habits and attitudes in the students' daily agendas. The challenges' topics included efficient use of water and energy, waste reduction, responsible consumption, fair trade, nutrition and wellness, among others. Strengths and opportunity areas for this type of activity were identified.