10. Final Fantasy VII's Buster Sword - Just Cause 3
https://youtu.be/QyvdVHAVRvo Just Cause developers Avalanche have always been great at injecting their massive game worlds with all sorts of brilliant secrets you need to hunt down. Just Cause 2 saw them recreate the entire island from LOST, complete with hatch and mysterious smoking man-monster, and JC3 doesn't let up either, having Cloud's iconic Buster Sword pop up on a mountainside. You can see where to track it down in the above video, and although it's sadly not usable, does look pretty badass sticking out the ground like gaming's own Excalibur.