System Cracker was one of three hacking minigames from Sly Cooper: Thieves in Time and Bentley's Hackpack, and the most basic. Along with Alter Ego and Spark Runner, it was used to hack into adversarial systems in order to gain information or interfere with operations. At its most basic, it is the same as the hacking from Sly 2: Band of Thieves and Sly 3: Honor Among Thieves, though it has the addition of new Avatars to hack with; the basic Shell Code, the powerful Panzer Code, and the fast Speeder Code.
Sly Cooper: Thieves in Time
In Thieves in Time, Bentley uses hacking to gain access to information from within various computer systems, as well as crippling them, by shutting down the systems. It can be done remotely from the Hideout, by having Sly Cooper or others place a remote hacking device onto the computer that requires hacking, or it can be done by accessing the computer itself.
The minigames all are used as challenges in the arcade cabinets that appear in each hideout after collecting all of the Treasures in that episode. The high scores must all be beaten in order to gain both the "Child of the 80's" and "8-Bit Bentley Style" trophies.
Bentley's Hackpack turns System Cracker, Alter Ego, and Spark Runner into arcade machines, each with multiple maps and challenges associated with each map. Completing challenges allows Bentley to collect tokens, which in turn unlock prizes from the Prize Gallery.