This study attempts to explore the factors that engage (behavioural factors) and motivate (psychological factors) crowd-workers in the gamified crowdsourcing apps in the context of logistics and sustainable supply chain management. Thus, using the self-determination theory and theory of cognitive engagement, we conduct critical in-depth interviews with crowd-workers and their task. We conducted a qualitative thematic analysis to explore the psychological and behavioural factors for engaging and motivating crowd-workers in gamified crowdsourcing mobile apps in the context of logistics and sustainable supply chain management. This study adopted mono-method qualitative approach and in depth-interviews were done by a researcher who was well-trained in qualitative research and was acquainted with the knowledge of crowdsourcing. Using the non-probabilistic sampling method of purposeful sampling, interviewer virtually met 11 individuals to collect data on a pre-decided date and time. The interview questions been prepared based on the theoretical constructs of self-determination theory and theory of cognitive engagement and the thematic analysis was conducted using NVivo software.