Sony Computer Entertainment announced three new additions to its Greatest Hits Library. The three games are Ratchet and Clank, Sly Cooper and the Thievius Raccoonus, and the ever-popular SOCOM: US Navy SEALs.

What exactly makes a game a “greatest hit?” Sony requires that a title “must have been on the market for one year with 400,000 copies produced, proving to be a force in driving software sales and the demand for the hardware that supports it.” In addition, the title must sell at least 250,000 units.

These three games bring the PlayStation 2 Greatest Hits Library up to 52 games. To get a better idea of how many titles make the cut of “greatest hits,” consider that over 550 PlayStation 2 games have been released. Basically, a shade fewer than ten percent of the available titles have made the Greatest Hits cut.

The MSRP on PlayStation 2 Greatest Hits titles go as low as 19.99.

"We're excited about crowning our newest 'Greatest Hits' titles because it reaffirms our reputation as the leader in computer entertainment and further demonstrates our ability to offer compelling blockbuster games across multiple generations," said Ami Blaire, director, product marketing, Sony Computer Entertainment America. "These serve as a testament to the fact that our titles represent the best value for any console on the market today."

The addition of SOCOM: US Navy SEALs to this list only strengthens Sony’s online ambition. Since SOCOM is one of the most popular online titles in the Playstation 2 library, a lower price can only help promote online gaming with the new PlayStation 2 bundle announced a few weeks ago.