[Every week, we sum up sister iPhone site FingerGaming's top news and reviews for Apple's nascent -- and increasingly exciting -- portable games platform, as written by editor in chief Danny Cowan and authors Tucker Dean, Jason Johnson, Ryan Hibbeler, and Mike Rose.]

This week, FingerGaming covers Gameloft's Blokus and a port of Sega's 16-bit classic platformer Sonic the Hedgehog 2.

Also within are the lists for top-grossing, most-downloaded free and paid Apps from Apple's store, as well as reviews for Tractor Beam, Ozone, and Saving Private Sheep.

Here are the top stories from the last seven days:

- Top-Grossing Game Apps: Chaos Rings Leads in Debut Week
"Square Enix's iPhone-exclusive RPG Chaos Rings leads the App Store's sales charts in its second day of release, and finishes as this week's highest-grossing application across all categories."

- Impressions: Square Enix's Chaos Rings
"Chaos Rings resembles a PlayStation-era RPG in the vein of Final Fantasy VII, VII, and IX, and sets the bar pretty high for the quality of 3D graphics on the iPhone.

- Review: Ozone
"Many of the Ozone's mechanics -- and all of its presentation -- seem designed to create a mellow game that can be explored at the player's own pace, but its hazard and level designs demand quick reflexes and skillful navigation."

- Sega Brings Sonic the Hedgehog 2 to App Store
"As with the original Sonic the Hedgehog, the App Store's Sonic 2 is an emulated version of Sega's classic 16-bit platformer. Players speed through a series of colorful levels as supersonic hedgehog Sonic and his flying fox friend Tails."

- Top iPhone Game Apps: ZombieSmash Outsells Doodle Jump
"Newcomer ZombieSmash beats last week's chart champion Doodle Jump in today's iPhone sales rankings, as Skee-Ball rises up to third place after previously taking fifth."

- Review: Saving Private Sheep
"Saving Private Sheep is puzzle game similar to Tumbledrop and many other physics based puzzlers released over the past few years, but with one key difference: it's made by people who obviously love classic animation."

- Gameloft Brings Officially Licensed Blokus to App Store
"The popular strategy board game Blokus has been cloned many times over in unlicensed App Store adaptations, but Gameloft has at last brought an official version to the iPhone and iPod Touch."

- Top iPad Game Apps: The Pinball HD Overtakes Real Racing HD
"Gameprom's The Pinball HD earns the iPad's top sales spot this week, while Bad Weasel's Big Bad Sudoku Book rises to the top of the free charts during a limited-time free download promotion."

- Review: Qbism
"Qbism takes the sliding block puzzle into the third dimension. Given a 3D outline, your job is to flick all the surrounding cubes into the appropriate shape, which can be spun 360 degrees."

- Acclaimed Sega Saturn Pinball Sim Last Gladiators Gets App Store Release
"Developer KAZe's 1995 pinball compilation Last Gladiators has been ported to the iPhone and iPod Touch, with additional tables available as somewhat pricy in-app purchases at $4.99 each."