Based upon the original Sega Genesis/Mega Drive game rather than the many downgraded versions subsequently released, Sega's Sonic the Hedgehog ($5) is the iPod's first true action-platforming game, putting you in command of the famous blue hedgehog as he makes his way through a world of robotic creatures and traps, trying to save woodland animals from cyborg enslavement. Sega converts the Click Wheel into a four-way controller with a single button…
