Jumper: Get through the grindrail without losing a HP
Accuracy counts: Destroy a small fighter with the turret
Eat lead: Use a Sand Mouse to take out all tanks
Right at the beginning, where you can use your Trespasser to open up a door with a lot of boxes behind it, do wall jumps there and the Gold Bolt will be there on the roof.
You need the Helipack: go where the first tank was, and go over the bridge. Go right from the small building up the ledges and start jumping off from ledge to ledge doing stretch-jumps (R1+Cross) and you’ll eventually arrive to the gold bolt.