Batman: Arkham Origins Blackgate detective cases guide

Ground Zero

Clue #1: Portion of a metal bracelet

Early in Cell Blocks, you'll use a vent to crawl past a stack of crates. Exit through the vent inside this tunnel (not the left exit), and you'll come to a courtyard with several thugs and an improvised bomb. Detonate the bomb with the Crypto Sequencer, then drop into the pit to find this clue on the ground.

Clue #2: Burned needle nose pliers

After receiving the Batclaw, you'll backtrack on your way to the exercise yard. When you reach the room where you dropped the elevator with frayed cables, leap over the flames on the lowest floor. Pull the vent with the Batclaw, then crawl into another room where this clue sits on a shelf.

Clue #3: Rubble fragments

When you return to the area where Catwoman sent you on a detour, you'll use the Batclaw to rip away a vent cover. Enter that vent and crawl forward, but stop before exiting. Those little bits of rocks in front of you are actually another clue.

Thanks to commenter leonardo-sensui for tipping us off to this one!

The Joker Is Wild

Clue #1: Dead guard

You'll find this on the guard's body as soon as you enter Administration.

Clue #2: Odd assemblage of metal parts

When you ascend the shaft with the first Joker thug, continue to the top. Use the Batarang to knock away the trap door, then grapple to an upper room. In here, grapple to the ledge, then turn around and jump across the gap. Blow this wall with the Gel Launcher to find a clue on a box inside.

Clue #3: Police-issue gas mask

After opening the Joker's present, drop into the grate it was covering. When you emerge from the shaft, the clue will be on your left.

Clue #4: Spray food cans

When you enter the admin basement, use the Gel Launcher to destroy the broken brick wall above the leaking pipe. Continue through the room and take out the huge group of thugs. Grapple to the yellow ledge, shimmy right, and drop down onto the catwalk. From here, use the Line Launcher to enter the area where you blew away the brick. The clue is back here.


Clue #1: Glass eye

On your way to the construction area of Administration, you'll pull a book to move a bookshelf. This is in the safe behind it.

Clue #2: Class ring

Immediately after acquiring the Line Launcher, you'll zip over an electrified floor. Drop through the hole in the floor on the other side, and the clue will be on a box to your right.

Clue #3: Hand-drawn map of Administration

When you enter from the roof (after the battle with Deadshot), look to the boxes on your left for another clue.

Clue #4: Deceased assistant warden

Just before entering the admin basement, you'll open a beta lock with the Crypto Sequencer. On the other side is a dead employee - the next clue.




  • marc-henri-alcide - November 5, 2013 3:16 p.m.

    i can't find second case from bird of prey( clipboard)
  • Tony Wilson - November 6, 2013 7:41 a.m.

    Before you enter Cell Blocks, you've have to grapple up those two ledges and crawl through a vent right? Before you grapple to the vent, you can actually drop down into a small gated-off area. It's on the ground there.
  • marc-henri-alcide - November 6, 2013 7:43 a.m.

    thanks i got that. do you know how to disable joker gas also? i can't get the personal file case ? thanks in advance.
  • Tony Wilson - November 6, 2013 8:18 a.m.

    I take it you're making your way through Administration presently? Later in the level, you'll get the beta code for the Crypto Sequencer. There's a room above the library (to the right of it on the map) where you have to use the Line Launcher - the room just before the crossed flaming beams. Instead of launching, drop down to find a beta Crypto Sequence box. Complete it, and the gas goes away.
  • marc-henri-alcide - November 6, 2013 8:33 a.m.

    you know where joker had two prisoners then later on he released the gas. thats the case i cant get. i got the code everything. dont know where to go.
  • Tony Wilson - November 6, 2013 9:47 a.m.

    The two prisoners in the library? Yeah, that took me a bit to figure out. In the second room - where the prisoners were actually held - grapple up the left balcony. The vent there can be crawled through even though it looks like it's just leaking gas.
  • leonardo-sensui - November 5, 2013 10:35 a.m.

    you forgot ground zero case file #3
  • Tony Wilson - November 6, 2013 7:40 a.m.

    Still searching, actually. If you've got any tips, feel free to post them here!
  • leonardo-sensui - November 6, 2013 8:42 a.m.

    i found it and i take a picture, but i don't know how explain
  • Tony Wilson - November 6, 2013 9:48 a.m.

    Twitpic me: @chaingunpope

Showing 1-10 of 10 comments

Join the Discussion
Add a comment (HTML tags are not allowed.)
Characters remaining: 5000