Sly Cooper and the Thievius Raccoonus

Sly Cooper and the Thievius Raccoonus is a video game from the "Sly Cooper" series for the PlayStation 2. It was released in September 2002. In this game, you play as Sly Cooper and attempt to get the pages of the Thievius Raccoonus (a book) back.
Plot.
After the tragic murder of his parents and robbery of his family treasure (the Thievius Raccoonus) by the Fiendish Five, the protagonist of the game Sly Cooper was put into an orphanage. There he meets his lifelong friends and partners in crime, a hyperintelligent turtle called Bentley and a van loving hippopotamus called Murray. At the orphanage they decide to help Sly in his mission to regaining his family legacy and take down the Fiendish Five which consisted of a group of villains called Raleigh, Muggshot, Mz. Ruby, Panda King, and their leader Clockwerk who each possessed 1/5th of the Thievius Raccoonus. As the game progresses you take down each member of the Fiendish Five and regain a section of the Theivius Raccoonus. 
Gameplay.
"Sly Cooper" is a 3D platformer. Sly has jumping and stealth abilities. You explore each level with the end goal of finding a key as well as collecting clues along the way in order to unlock a safe which will contain a new abilities, upgrade, or information.