The online service received the update yesterday following maintenance work. A range of compatible games will be unveiled later today.
Sony's first slate of 3D titles for the console includes WipEout HD, SuperStardustHD, PAIN and a demo of MotorStorm: Pacific Rift.
Each game will cost $29.99 (£23.99) but will be available for free as part of the Sony Bravia 3D TV package.
"PlayStation has always been about outstanding entertainment," said SCEE president Andrew House. "The stereoscopic 3D Collection showcases the depth of technology behind PS3 and gives us a feel for the potential for future releases.
"Stereoscopic 3D technology coupled with the likes of PlayStation Move motion controller allows us to create an ever more compelling, realistic and immersive experience. Add to that our online capabilities, community interaction features, our film and music services and you've got a very exciting proposition for the future of home entertainment."
Those who already own the games can upgrade them to 3D by downloading a free patch.