Kratos runs the NG gauntlet.
Ninja Gaiden Sigma - Ryu Hayabusa + Kratos = Spartan Gaiden Sigma(?)
The Ghost of Sparta's given any of his own weapons/magic powers whenever/where ever required, if able to replace norm requirements. Basic plot devices (that includes Kratos' own mystical, life-restoring falcon should he fall to Doku early on), enemies, and supporting characters are all there as they are by default, waiting for Kratos to brutalize it as he sees fit (Kratos is, however prohibited, from pressing circle when near Rachel).
Can he skewer, smash, and tear his way through the Fiend army, or does he fall a few decapitations short of avenging the Hayabusa village in Ryu's stead?