Walkthrough:Crypt Hack
"Crypt Hack" was a job for Bentley in "A Tangled Web" of Sly 2: Band of Thieves.
Walkthrough
Objective
Hack the three computers in the crypts to power up the old terminal in the re-education tower.
The mission
You will need to reach the end of the hallway to retrieve the acid battery. Dodge the spinning spike traps and swinging axes, as well as the monstrous tentacles that pop out of the water in the final room. Though it is not necessary, you can shoot these tentacles with Bentley's sleep darts.
Upon obtaining the battery, you must head back the way you came and hack the three computers in the crypt. Get near each computer and Bentley will hack it. Extra caution must be taken to avoid the traps in the hallway. If you take damage, the acid battery will be destroyed, and you will fail the mission, respawning at the last hacked computer. Once you hack all three computers, the old terminal will be completely powered up, and the mission ends.