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Using this card, you will have the codes necessary to hack the network tower's access panels.
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Take the grate off (you might need to switch out of Detective Mode for this) before switching back to Detective Mode and scanning the card. You will be prompted to play it back and forth a few times to see where the keycard (marked with the red line) falls through the grate. Using Detective Mode, follow the on-screen prompts to reconstruct the crime scene. Soon you will reach a door that requires a passkey, but has already blown up in someone else's face. Follow the on-screen instructions to use your smoke screen pellets and your grappling hook in order to take out the hostiles one by one using takedowns. Inside the comms tower you will find a hostage situation going on. On the way there, Batman notices a jamming signal from the communications towers he uses for his auto-navigation and decides to investigate. Head over to the Batwing to Fast Travel to Jezebel Plaza. That about sums up what there is to do in the Batcave. Complete the first two combat exercises in order to get some additional XP. If you explore a little, you will find the training dummy and the Training Console. You can highlight what each of them are using W-A-S-D.
BATMAN ARKHAM CITY WALKTHROUGH XBOX 360 UPGRADE
You should be able to upgrade one of your skills now, so hit and check out some of the skill trees under Combat & Stealth. After doing this, your next objective is to go to Jezebel Plaza. Head over to the Batcomputer to find out what was on the memory card you took out of the smashed drone. You regain control after the fight with Killer Croc in the Batcave. This walkthrough continues from the fight with Killer Croc.