I thought Just Cause was pretty meh, Just Cause 2 was incredible regardless of the jank though (played it revently). If you decide to play the second installment, I recommend installing the grappling hook mod that lets you grapple from waaay farther - otherwise traversel becomes a pain since the world‘s insanely big. Also, you gotta turn off a few graphic options on modern PCs or the game crashes randomly (and will still crash regardless when you get close to the skull island, at least for me).