CBRNE training for first responders in Canada currently consist of on-line training complemented with occasional field exercises. Completing all levels of training is expensive, includes significant time away from normal duties, and is limited to a small proportion of the end-user community. The current curriculum does not utilize training in a simulated urban environment using realistic hazard scenarios. Thus, there is a significant capability gapneed in providing realistic training for all first responders. The objective of the FRITSE project was to develop a highly realistic, game-based simulation environment for first responders to conduct team training and collaborations in order to more effectively address deliberate or accidental releases of CBRNE materials in urban environments. This was to be achieved by developing a realistic multi-event urban scenario for a chemical or biological attack, and integrating an accurate urban dispersion model for a high-fidelity GIS representation of an urban setting Calgary with a proven game-based simulation engine with accurate renderings of buildings, equipment and avatars to produce a simulation environment that is realistic and engaging. The tasks addressed by LuomaTech Inc. included leading the development of the scenario for a multievent railway incident in an urban setting that included an initial train derailment followed shortly after by a release of chemical agent and shortly after that a massive explosion in a highly populated and politically sensitive and busy commercial area of downtown Calgary. LuomaTech Inc. was also tasked to participate in the development of accurate renderings of equipment, development of avatars, and integration of the correct behaviours based on first responder operating procedures.