ThiefNet

ThiefNet is a website that the Cooper Gang uses to sell their stolen loot for coins, and then use those coins to buy new power-ups to use in the field. It also has a chat room in which Bentley met Penelope and Dimitri Lousteau contacted the gang for help with obtaining his grandfather's scuba gear.

Sly 2: Band of Thieves
First introduced after completing the mission "Bug Dimitri's Office," this in-game website allows you to buy a vast amount of power-ups. When you pickpocket loot from a guard, you can go back to your Safehouse and sell that treasure for a set amount of coins.

Sly 3: Honor Among Thieves
In Sly 3: Honor Among Thieves, ThiefNet returned with several other features in the game. Loot is now immediately sold upon stealing, so the "Sell" tab has been removed. There is also a chat room which Bentley used to contact with Penelope.

Sly Cooper: Thieves in Time
ThiefNet also appears in Sly Cooper: Thieves in Time. In addition to new power-ups, the user interface is noticeably different. Power-ups can be bought for all members of the Cooper Gang, including Carmelita Fox. Unlike in previous games, buying power-ups is done with a single press, and power-ups remain displayed on the list after purchase. The version numbers of Bentley's hacking tools—System Cracker, Alter Ego and Spark Runner—are shown on the left side of the screen.

Trivia

 * Midway through the episode A Cold Alliance in Sly 3, Bentley's laptop will be stolen by General Tsao, preventing access to ThiefNet until the completion of the job "Laptop Retrieval". This marks the only time in the series in which accessing ThiefNet can be temporarily disabled due to certain events in-game.