On Monday Sony announced it was giving away four free games to PlayStation Vita owners in order to celebrate the one year anniversary of the portable console in North America.

Yesterday, Sony officially revealed the PlayStation 4 at an event in New York City. Although Sony announced a number of specs and highlighted some upcoming features, it didn't really break down what those components meant. We take a look back at the details and highlight the important parts of what Sony did — and did not — say at yesterday's event.

PS4 redefines rich and immersive gameplay with powerful graphics and speed, intelligent personalization, deeply integrated social capabilities, and innovative second-screen features, all combined with cloud technology.

Metal Gear Rising: Revengeance is an all new breath-taking action title wherein the player guides Raiden through a series of beautifully-realized stages. Raiden is armed with a High Frequency katana blade which he uses to cut through anything that stands in his way.

Serious Sam Double D XXL has been rebuilt and reloaded with all-new features, missions, and weapons with a wild campaign cooperative mode featuring titular Serious Sam and his brother-in-arms, Dan “Huff” Huffington.

Tilt, turn and rotate your Nintendo 3DS to move a puddle of water through a magical world. Change between liquid, ice or steam to solve gravity-defying puzzles and defeat Goop monsters. It features a storybook setting that spans the ages, from dinosaurs to the modern age and beyond.

In Oddworld: Stranger's Wrath, players step into the role of the Stranger, a rough and tumble bounty hunter who tracks down outlaws for moolah. Using a special weapons system that gives a whole new meaning to "live" ammo, players encounter deviant species and hostile challenges along the way.

Surge takes addictive tile-matching gameplay and adds a hardcore pulse with unique mechanics, strategic depth and online scores.

Samurai G is a non-stop action game that challenges players of all levels. As Tetsuo, you must collect as much of Tengu's gold as possible before the evil Warlord Fuma's assassins do. Activate Golden Mode to harness the power of Tengu's Gold and see why the power must not fall to the wrong hands.