Nowadays, the number and the magnitude of natural hazards are increasing. During emergency situations different forms of cooperation take place, including the crowd-sourcing, which is envisioned by many Disaster Risk Management approaches to enable citizens to support the emergency management process. However, crowdsourcing is a challenging paradigm as it requires a sustained engagement in order to be effective. In this paper we propose a gamification strategy for crowdsourced Disaster Risk Management services aimed to increase awareness, engagement, and change people behaviors.