Just Cause has always been a special franchise. While other open world games focused on delivering a serious story set in a realistic world, Just Cause focused on being goofy and giving players gravity-defying tools. Just Cause 3, technical problems aside, was an insanely fun game that let players destroy its work with RPGs, explosive tanks and a highly-useful grappling hook. With the previous game offering players so much bang per rocket, what could a sequel possibly do to one-up it? Avalanche Studios has an idea and it involves weather.
Source: N4G PC E3 2018: Weather Takes Center Stage in Just Cause 4 | Hardcore Gamer