[Every week, Games On Deck sums 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 Louise Yang and Jonathan Glover.]

This week, FingerGaming highlights recent releases like Namco's Ridge Racer: Accelerated, EA's street racing sim Need for Speed: Shift, and Gameloft's Halo-like FPS N.O.V.A.

Here are the top stories from the last seven days:

- Top-Grossing Game Apps: Where's Waldo? Beats Call of Duty
"Activision's Call of Duty: World at War Zombies drops to second place in today's rankings, as Ludia's iPhone adaptation of the Where's Waldo? series of puzzle books climbs up to the top."

- Gameloft's N.O.V.A. Now Available for iPhone
"Gameloft's sci-fi first-person shooter N.O.V.A. turned heads when it was revealed earlier this year, both for its impressive graphics and because of its obvious similarity to Bungie's Halo series."

- EA Releases Need for Speed: Shift for iPhone
"Shift is a sim-styled street racing title that features a lineup of 20 licensed cars. Each vehicle can be customized in both performance and in appearance -- players can choose from a variety of spoilers, rims, and specialized paint jobs."

- Top Free Game App Downloads for the Week
"Donut Games' Traffic Rush tops the free charts for the second week in a row. RuneScape developer Jagex comes in at second place with its debut iPhone title Bouncedown, as Storm8's iMobsters takes third place."

- Canabalt Updates with Global Leaderboards, New Obstacles
"Think you've finally beaten your Canabalt addiction? Think again. Semi Secret Software has rolled out a Canabalt update that includes new gameplay elements, a new music track, and global leaderboards."

- Ridge Racer: Accelerated Premieres for iPhone
"Accelerated features much of the same drift-heavy racing that defined previous entries in the series. In a controversial move, however, Namco has locked the majority of the game's content away as optional in-app purchases."

- Top-Selling Paid Game Apps for the Week
"Where's Waldo? tops the paid app charts in its debut week. The recently updated Doodle Jump drops to second place, as Bejeweled 2 follows at third."

- SNK Playmore Premieres in App Store with Metal Slug Touch
"Metal Slug Touch is simplified take on SNK's run-and-gun franchise -- one that could be better suited to the iPhone's capabilities. Players control the Metal Slug vehicles using the accelerometer, with an on-screen button triggering alternate fire."