After a successful decade as a Centre of Excellence funded by the Norwegian Research Council, the Centre for Arctic Gas Hydrate, Environment and Climate (CAGE) will draw to a close at the end of February 2023. In this final report, we reflect on the extraordinary accomplishments, impacts, and legacy from the second phase of CAGE (2017-2023). The first phase of the Centre (2013-2017) was reported in the CAGE Annual 2016 Report.