Sony Computer Entertainment has announced God of War: Ghost of Sparta, an all-new God of War game for PSP from Ready At Dawn Studios, the studio behind the excellent Chains of Olympus.

Serving as a prequel, this new journey picks up after God of War concludes, telling the story of Kratos' ascension to power as the God of War. In his quest to rid the nightmares that haunt him, Kratos must face his dark past to prove his worthiness to the Gods - a journey that will reveal the origins of lost worlds, and finally answer long-awaited questions about Kratos' tattoo, scar, and family.

Armed with the deadly chained Blades of Chaos, Kratos will once again have to overcome armies of mythological monsters, legions of undead soldiers, and brutal landscapes throughout his merciless quest.

Graphically, Ready At Dawn are said to be pushing the PSP to the limits with state-of-the-art visual technologies, higher quality environments and greater depth of scale. Fans can also expect an improved weapon system, new magical powers and much more.

Look out for more on God of War: Ghost of Sparta at E3. The game's scheduled for release later this year.