i wanted to see if one could get to places you aren’t supposed to and thanks to the grapple you can but there’s return to battlefield timer that kills you after around 9 seconds.
haven’t found anything interesting yet apart from a lone grunt, it’s directly above the base where you first enter the open world. just behind some wreckage atop the cliffs.
you can kill it if you are quick before the game kills you.
you need to grapple and jump to get up there.