This deliverable presents the MYRIAD-EU Multi-Risk Toolkit - a modular, open-source softwareplatform developed under Work Package 5 to support comprehensive multi-hazard and multi-riskscenario generation. Designed to address the complexity of systemic risk in a changing climate, the toolkit enablesquantitative, semi-quantitative, and qualitative assessments across hazards, sectors, andgeographies. Through its web-based interface and integrated QGIS plugin, the software empowersusers to explore cascading impacts, test mitigation strategies, and support decision-making withevidence-based risk insights. This was one of the key findings as part of WP5, that only quantitativemodelling cannot fully encompass the needs of sectors towards multi-risk.The toolkit comprises core analytical modules including the Curve Explorer, Exposure at Risk,Scenario Calculator, Scenario Showcase, and the Vulnerability Index Editor. These allow users tovisualise vulnerability functions, assess sectoral exposure, simulate risk under concurrent orsequential hazards, and generate spatial vulnerability indices. Complementary observatories, such as the EU Tourism Resilience Observatory, further extend the toolkit’s application to destination-specific risk profiling and sectoral solutions, specifically for tourism. Integration with datasets and concepts from across MYRIAD-EU (WPs 1–4, 6) ensures alignmentwith state-of-the-art risk science and stakeholder-driven methodologies.The user guide, included in this deliverable, provides detailed operational support for deploying andapplying the toolkit in research and policy settings. It includes setup instructions, methodologicalbackground, user workflows, and guidance on future extensibility. Future enhancements will focuson improving sectoral data coverage, dynamic vulnerability integration, and long-term usability. Thetoolkit is accessible via www.myriad-multirisk.eu and maintained by Risklayer to ensure ongoingrelevance beyond the project duration.