Go ahead if you need it, thats what this thread is for.
I had an idea to share...
You are a private in a special squad called S.G.R.T, (Some Group that Removes Threats, great huh?

) There is a terrorist group (called something else) that is developing a T.M.E Virus (Trans-Mutated Evolution Virus) that changes regular humans into putrid creatures.
I was thinking that in the beginning, you start with your squad in a stealthy mission in a warehouse, then transitions into greater battles within cities or towns, then into a laboratory for the final battle...
...But suddenly, the T.M.E.V (or T-MEV) bomb explodes, releasing the virus! then you alone (While everyone is a mindless devouring monster, even your squad) must survive and find the missing cure from a secret lab with a half dead scientists you was developing a cure while he was working on the virus... and the story picks up somewhere here........
Hows that!
I'd have to say........ The Game Creators can make dreams come true.