This will detail how to unlock the Talon Suit Transmog in Gotham Knights. It will also reveal the locations for all five of the Talon Caches.
The majority of the Transmog Suits are unlocked by completing a side activity/collectible, or simply crafting a suit with that Suit Style as part of the appropriate Challenge. However, there is one Transmog that works a bit differently than the others, which is the Talon Suit Transmog. You won’t be able to unlock this until you have reached Case 03 in the main story. Once you have reached that point, you will be able to find some murals across Gotham that glow green when you’re near them.
You will also know you’re near them, as Alfred will chime in on communications and mention something about an odd energy signature nearby. That’s your cue to know the Talon Caches are close. You won’t be able to see them with your AR scan, but they all give off a green glow, so they are quite easy to spot, too. There’s only five Talon Caches in the game and in order to complete them, just walk up to the mural and look for the button prompt. You will some crafting materials from the Talon Caches, including the Legendary Nth Metal, which is quite rare.
Southside Talon Cache
The Talon Cache in Southside is located northwest of the Ocran Chemicals building. You will want to be right next to the water, with the mural you need being on the side of the wall/building. If you’re coming from the power plant, then it will be right past it, going to the north.
Old Gotham Talon Cache
This one is pretty easy to find, since it’s by an actual landmark. Just southeast of the Fast Travel point here is Gotham City Hall. Go there, then look on the wall to the south of the City Hall to find the mural and Talon Cache.
Financial District Talon Cache
The Talon Cache in the Financial District is a bit tricky to find, as it’s in an underground area. To get there, start at the Fast Travel spot in the area, then head west of it to find some stairs that should lead down. There is actually an entrance you can jump down to at the intersection of Third Street and Barr Avenue. Jump down here, then go to the northwestern side to find a tunnel. Go down this tunnel, then make a U-Turn to a little spot to the east and the mural/Talon Cache should be right there.
Bowery Talon Cache
Start off from the Fast Travel point here, then look southwest of it to spy a large building. The Talon Cache isn’t actually on street level here, so it can be a little tricky to find. This will put you at a three-way intersection, but if you look at the entrance to that large building, there is a little ledge right above it. Grapple to that ledge and it will put you right in front of the Talon Cache.
Gotham Heights Talon Cache
Northwest of the Fast Travel point here is Gotham City University. Enter the grounds of the university to the northwest, past the large gated fence, and keep heading in that direction until you find a covered pedestrian pseudo-tunnel. As soon as you enter the tunnel, turn to the southwest and you should see the Talon Cache.