Ninja Gaiden 2. It's such a silly game xD
Level 1. Fighting Ninja's on skyscrapers. Boss fight is a giant spider on a helipad.
Level 2. Fighting Ninja's in a town owned by your clan. Boss fight is a Nina with a backhanded katana with red lightning and Wolverine claws.
So far, not so strange right? Aside from the giant spider, it's just the typical nina stuff, right?
Level 3. Fighting Ninja's, Dog Ninja's that use a dagger in their mouth and toss exploding shurkens, demon bats, and massive pink monsters that breath fire through New York. Boss fight is a cyborg worm with a cherubs face that conducts lightning.
Okay, huh? What's next, fighting Werewolves in Rome?