Underated Gems presents, 2009's MotorStorm Arctic Edge for the PSP and PS2... Generally identical apart from the PSP version being able play online and having a photo mode which is kinda weird
GameSpy: The Consensus: MotorStorm: Arctic Edge Review - Page 1
MotorStorm: Arctic Edge (USA) PSP ISO - CDRomance
Amazon.com: MotorStorm: Arctic Edge - Sony PSP
Sony PSP Motorstorm Arctic Edge Bundle - Consolevariations
Talking brutal off-road PSP racing with MotorStorm Arctic Edge's Richard Ogden | Pocket Gamer