GameReactor - I'm playing Warriors Orochi 3 Hyper, and the question is entirely justified. At a glance (or even a lingering stare), the continued success of the Warriors franchises is hard to grasp.
The game's a mixture of the two major Tecmo Koei brands: Dynasty Warriors and Samurai Warriors. Both series that have long legacies and several games under their respective titles. The premise though is roughly the same: mowing through enemy hordes and everything that has any relation to Japan's early history.