Agreed! Its sequel Just Cause 3 was good too. JC3 had a great soundtrack and did a fantastic job integrating it into gameplay.
The music was varied and thematic, but it was dynamic. You'd be sneaking around an enemy base, with tense music building, well, tension. Then when you blew up the first Standard Procedure Explosive Red Thing, the music kicked into gear as enemies freaked out and started gunning for you. You ran around for a bit shooting back and blowing up more stuff. And then you picked up that minigun, and the music swells into an "epic movie finale" flavor of the same motif while you're stomping around cutting through people and machines like butter. Talk about feeling like an utter badass.
If you download the full soundtrack, it becomes clear how they did what I'm talking about -- for any given segment of music, they included like 4 or 5 different versions of the motif with progressively increasing intensity. Great stuff throughout, though.
Honorable mention to Doom (2016) as well. That first time "BFG Division" plays (in that tower thing, I think?) during a big battle with those mancubus things and it hits the first chorus, that's a pretty good moment too. That whole tune just keeps you pumped throughout the fight.