Here is a platformer I started making a few days ago, it's called Dark Fortress.
The storyline goes something like:
The genius military scientist Kaskov helped the alliance win the Great War with his ingenius technology. But after the war he started to develop unethical and dangerous technology and was stepped down from service. With his resources cut off, the military thought Kaskov would abandon his horrific projects.
But it seems now, years later, that Kaskov has aquired the resources he needs to develop some sort of transmitter. This transmitter, dubbed the LeerCom, has the ability to animate the dead!
Kaskov has succeeded thus far in building a prototype that has a range of the areas surrounding his castle. The military have learned he is building a far more powerful one. Their only choice is to storm the castle and destroy the LeerCom and capture Kaskov.
The mission began only minutes ago...
Basically you take the role of a marine and you have to infiltrate the castle fighting hordes of zombies.
You have your rifle, a grenade launcher and some hand to hand combat moves.