In the Ratchet and Clank games, bolts are your main currency. This is no exception in Ratchet and Clank: Rift Apart, as you will need bolts for ammo and buying new weapons. Fortunately, there are tons of ways to earn them.
The most obvious methods are killing enemies and breaking various objects in the area. This is something you will do during your adventure, so don’t be afraid of destroying everything around and leaving no survivors behind. Just make sure you are close to the bolts to collect them before they go away. It’s also a good idea to complete secondary objectives and pocket dimensions. The arena is also a great way to farm bolts as it can be repeated as often as you like.
If all you want is as many screws as you can and don’t mind chewing a bit, head over to Sargasso’s Pocket Dimension 729-2110-01. Destroy the exploding platforms and you will earn tons of bolts. They respawn over and over so that this process can be repeated. Check out the video below to see it in action.
Another method is to complete the story and enter the challenge mode. This is essentially New Game Plus with tougher enemies, but you keep all of your guns. The stud multiplier is also active and will keep increasing the number of studs earned if you are not damaged. With a 20x multiplier and a couple of passes through the arena, topping up your currency is very easy. Challenge mode also gives access to Omega versions of all maxed weapons. So if you really want each one, this is the way to go.