The second and last handheld God of War game proved to be one of the best installments in the series. Ghost of Sparta takes place sometime after the original and has Kratos looking for his brother, Demos.
It's a surprisingly well-told tale that helps humanize Kratos, showing a bit of his childhood and explaining why he comes to despise his fellow gods. This installment also still keeps the great combat from past games and manages to outshine its predecessor (Chains of Olympus) in every way, with better pacing and some great additions, like adding fire to your blades.
It may not have as many of the great bosses that we've come to expect from the series, and it was on the short side, but it's one that's still worth playing.