Download the data | Mission 6 - Special Missions HQ Splinter Cell: Blacklist Guide
Last update: 11 May 2016
At this point, things will get complicated again, even if you have earlier chosen the silent path to go through, and you have not sabotaged the cage's security system. In wait for the data to download (this will take exactly 90 seconds) you will have to avoid enemies, including additional guards that will reach this floor on the elevator. Because you do not need to stay right near the treasure's terminal, it is best to return to the manhole to the underground tunnels.
After you get under the cage, grab onto the pipe attached to the ceiling and remain in the position shown in the screenshot, i.e. between two side laser barricades. Do not let go because there will soon appear two enemies + one of them will visit the room where you are right now, and the second one will enter the neighboring area. Remain at the pipe until the countdown reaches zero. Do not jump down straight away because you do not need to hurry to reach the disc with the downloaded data. Before you return to the cage, you must make sure that nobody is looking towards Fisher from the neighboring area.
Grab onto the ladder and, before you climb up, check out if nobody is turned towards the manhole. After you return to the cage, turn left twice and approach the disc very carefully. It would be good if you used smoke grenades here- throw one of them towards the terminal with the disc and detonate the other one near the manhole. Performing this action will make it considerably easier to collect the disc and escape from the cage while remaining undetected. If you do not have smoke grenades on you, you can make use of other gadgets (e.g. sticky noisemakers). Or simply wait for the right moment to steal the data.
Additional tips for the Panther/Attack playing style: If you aren't against using any more aggressive methods, you can ensure yourself with obtaining the disc without any problems by using tear gas grenades or flashbang grenades.